Heterocyclic compounds as immunomodulators

ABSTRACT

Disclosed are compounds of Formula (I), methods of using the compounds as immunomodulators, and pharmaceutical compositions comprising such compounds. The compounds are useful in treating, preventing or ameliorating diseases or disorders such as cancer or infections.

The present application claims the benefit of U.S. ProvisionalApplication No. 62/670,249, filed May 11, 2018; and U.S. ProvisionalApplication No. 62/688,164, filed Jun. 21, 2018, each of which isincorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present application is concerned with pharmaceutically activecompounds. The disclosure provides compounds as well as theircompositions and methods of use. The compounds modulate PD-1/PD-L1protein/protein interaction and are useful in the treatment of variousdiseases including infectious diseases and cancer.

BACKGROUND OF THE INVENTION

The immune system plays an important role in controlling and eradicatingdiseases such as cancer. However, cancer cells often develop strategiesto evade or to suppress the immune system in order to favor theirgrowth. One such mechanism is altering the expression of co-stimulatoryand co-inhibitory molecules expressed on immune cells (Postow et al, J.Clinical Oncology 2015, 1-9). Blocking the signaling of an inhibitoryimmune checkpoint, such as PD-1, has proven to be a promising andeffective treatment modality.

Programmed cell death-1 (PD-1), also known as CD279, is a cell surfacereceptor expressed on activated T cells, natural killer T cells, Bcells, and macrophages (Greenwald et al, Annu. Rev. Immunol 2005,23:515-548; Okazaki and Honjo, Trends Immunol 2006, (4):195-201). Itfunctions as an intrinsic negative feedback system to prevent theactivation of T-cells, which in turn reduces autoimmunity and promotesself-tolerance. In addition, PD-1 is also known to play a critical rolein the suppression of antigen-specific T cell response in diseases likecancer and viral infection (Sharpe et al, Nat Immunol 2007 8, 239-245;Postow et al, J. Clinical Oncol 2015, 1-9).

The structure of PD-1 consists of an extracellular immunoglobulinvariable-like domain followed by a transmembrane region and anintracellular domain (Parry et al, Mol Cell Biol 2005, 9543-9553). Theintracellular domain contains two phosphorylation sites located in animmunoreceptor tyrosine-based inhibitory motif and an immunoreceptortyrosine-based switch motif, which suggests that PD-1 negativelyregulates T cell receptor-mediated signals. PD-1 has two ligands, PD-L1and PD-L2 (Parry et al, Mol Cell Biol 2005, 9543-9553; Latchman et al,Nat Immunol 2001, 2, 261-268), and they differ in their expressionpatterns. PD-L1 protein is unregulated on macrophages and dendriticcells in response to lipopolysaccharide and GM-CSF treatment, and on Tcells and B cells upon T cell receptor and B cell receptor signaling.PD-L1 is also highly expressed on almost all tumor cells, and theexpression is further increased after IFN-γ treatment (Iwai et al,PNAS2002, 99(19):12293-7; Blank et al, Cancer Res 2004, 64(3):1140-5).In fact, tumor PD-L1 expression status has been shown to be prognosticin multiple tumor types (Wang et al, Eur J Surg Oncol 2015; Huang et al,Oncol Rep 2015; Sabatier et al, Oncotarget 2015, 6(7): 5449-5464). PD-L2expression, in contrast, is more restricted and is expressed mainly bydendritic cells (Nakae et al, J Immunol 2006, 177:566-73). Ligation ofPD-1 with its ligands PD-L1 and PD-L2 on T cells delivers a signal thatinhibits IL-2 and IFN-γ production, as well as cell proliferationinduced upon T cell receptor activation (Carter et al, Eur J Immunol2002, 32(3):634-43; Freeman et al, J Exp Med 2000, 192(7):1027-34). Themechanism involves recruitment of SHP-2 or SHP-1 phosphatases to inhibitT cell receptor signaling such as Syk and Lck phosphorylation (Sharpe etal, Nat Immunol 2007, 8, 239-245). Activation of the PD-1 signaling axisalso attenuates PKC-θ activation loop phosphorylation, which isnecessary for the activation of NF-κB and AP1 pathways, and for cytokineproduction such as IL-2, IFN-γ and TNF (Sharpe et al, Nat Immunol 2007,8, 239-245; Carter et al, Eur J Immunol 2002, 32(3):634-43; Freeman etal, J Exp Med 2000, 192(7):1027-34).

Several lines of evidence from preclinical animal studies indicate thatPD-1 and its ligands negatively regulate immune responses.PD-1-deficient mice have been shown to develop lupus-likeglomerulonephritis and dilated cardiomyopathy (Nishimura et al, Immunity1999, 11:141-151; Nishimura et al, Science 2001, 291:319-322). Using anLCMV model of chronic infection, it has been shown that PD-1/PD-L1interaction inhibits activation, expansion and acquisition of effectorfunctions of virus-specific CD8 T cells (Barber et al, Nature 2006, 439,682-7). Together, these data support the development of a therapeuticapproach to block the PD-1-mediated inhibitory signaling cascade inorder to augment or “rescue” T cell response. Accordingly, there is aneed for new compounds that block PD-1/PD-L1 protein/proteininteraction.

SUMMARY

The present disclosure provides, inter alia, a compound of Formula (I):

or a pharmaceutically acceptable salt or a stereoisomer thereof, whereinconstituent variables are defined herein. The present disclosure furtherprovides a pharmaceutical composition comprising a compound disclosedherein, or a pharmaceutically acceptable salt or a stereoisomer thereof,and one or more pharmaceutically acceptable excipient or carrier.

The present disclosure further provides methods of inhibiting PD-1/PD-L1interaction, said method comprising administering to a patient acompound disclosed herein, or a pharmaceutically acceptable salt or astereoisomer thereof.

The present disclosure further provides methods of treating a disease ordisorder associated with inhibition of PD-1/PD-L1 interaction, saidmethod comprising administering to a patient in need thereof atherapeutically effective amount of a compound of disclosed herein, or apharmaceutically acceptable salt or a stereoisomer thereof.

The present disclosure further provides methods of enhancing,stimulating and/or increasing the immune response in a patient, saidmethod comprising administering to the patient in need thereof atherapeutically effective amount of a compound disclosed herein, or apharmaceutically acceptable salt or a stereoisomer thereof.

DETAILED DESCRIPTION I. Compounds

The present disclosure provides, inter alia, compounds of Formula I:

or a pharmaceutically acceptable salt or a stereoisomer thereof,wherein:

R¹ is methyl, CN, F, Cl, or Br;

R² is methyl, CN, F, Cl, or Br; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, 4- to 6-membered heterocycloalkyl or4- to 6-membered heterocycloalkyl-C₁₋₂ alkyl-, wherein the 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- each has one or two heteroatoms as ring members selected from O,N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- of R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, CH₃, F,Cl, Br, CN, ethyl, and propyl.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl, CN, F, Cl, or Br;

R² is methyl, CN, F, Cl, or Br; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, 4- to 6-membered heterocycloalkyl or4- to 6-membered heterocycloalkyl-C₁₋₂ alkyl-, wherein the 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- each has one or two heteroatoms as ring members selected from O,N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- of R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, and CH₃.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl, CN, F, Cl, or Br;

R² is methyl, CN, F, Cl, or Br; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, 4- to 6-membered heterocycloalkyl or4- to 6-membered heterocycloalkyl-C₁₋₂ alkyl-, wherein the 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- each has one or two heteroatoms as ring members selected from O,N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- of R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, and OH.

In some embodiments, R¹ is methyl, F, Cl, or Br. In some embodiments, R¹is methyl. In some embodiments, R¹ is F, Cl, or Br. In some embodiments,R¹ is Cl. In some embodiments, R¹ is methyl or Cl. In some embodiments,R¹ is CN. In some embodiments, R¹ is F. In some embodiments, R¹ is Br.

In some embodiments, R² is methyl. In some embodiments, R² is CN. Insome embodiments, R² is F, Cl, or Br. In some embodiments, R² is Cl. Insome embodiments, R² is methyl, CN, or Cl. In some embodiments, R² is F.In some embodiments, R² is Br.

In some embodiments, R¹ is Cl and R² is Cl.

In some embodiments, R¹ is Cl and R² is methyl.

In some embodiments, R¹ is methyl and R² is Cl.

In some embodiments, R¹ is Cl and R² is CN.

In some embodiments, R¹ is methyl and R² is methyl.

In some embodiments, R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl, wherein the5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, CH₃, F, Cl, Br, CN,ethyl, and propyl.

In some embodiments, R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆-aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl, wherein the5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, and CH₃.

In some embodiments, R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆-aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl, wherein the5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, and OH.

In some embodiments, the 1 or 2 substituents on R³ is independentlyselected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, and CH₃. In someembodiments, the substituent on R³ is CONH₂. In some embodiments, thesubstituent on R³ is SO₂NH₂. In some embodiments, the substituent on R³is COOH. In some embodiments, the substituent on R³ is OH. In someembodiments, the substituent on R³ is CON(CH₃)₂. In some embodiments,the substituent on R³ is CH₃. In some embodiments, the substituent on R³is F. In some embodiments, the substituent on R³ is Cl. In someembodiments, the substituent on R³ is Br. In some embodiments, thesubstituent on R³ is CN. In some embodiments, the substituent on R³ isethyl. In some embodiments, the substituent on R³ is propyl.

In some embodiments, R³ is H.

In some embodiments, R³ is C₁₋₄ alkyl, optionally substituted with 1 or2 substituents independently selected from COOH, OH, and CON(CH₃)₂.

In some embodiments, R³ is C₁₋₄ alkyl, optionally substituted with 1 or2 substituents independently selected from COOH and OH.

In some embodiments, R³ is methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, or 4-carboxybutyl.

In some embodiments, R³ is methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl or2-carboxy-2-methylpropyl.

In some embodiments, R³ is C₃₋₈ cycloalkyl, optionally substituted with1 or 2 substituents independently selected from COOH, OH, and CH₃.

In some embodiments, R³ is C₃₋₈ cycloalkyl, optionally substituted with1 or 2 substituents independently selected from COOH and OH.

In some embodiments, R³ is C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, optionallysubstituted with 1 or 2 substituents independently selected from COOHand OH.

In some embodiments, R³ is C₆₋₁₀ aryl-C₁₋₂ alkyl, optionally substitutedwith 1 or 2 substituents independently selected from COOH and OH.

In some embodiments, R³ is cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(4-carboxycyclohexyl)ethyl (e.g., (trans-4-carboxycyclohexyl)ethyl or(cis-4-carboxycyclohexyl)ethyl)), or 4-carboxy-4-methylcyclohexyl (e.g.,cis-4-carboxy-4-methylcyclohexyl or trans-4-carboxy-4-methylcyclohexyl).

In some embodiments, R³ is cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, or 4-carboxyphenethyl.

In some embodiments, R³ is 5- to 6-membered heteroaryl-C₁₋₂ alkyl,optionally substituted with 1 or 2 substituents independently selectedfrom CONH₂, SO₂NH₂, and COOH.

In some embodiments, R³ is 4- to 6-membered heterocycloalkyl, optionallysubstituted with 1 or 2 substituents independently selected from CONH₂,SO₂NH₂, and COOH.

In some embodiments, R³ is (1H-pyrazol-3-yl)methyl,tetrahydro-2H-pyran-4-yl, 1-carbamoylpiperidin-4-yl,1-sulfamoylpiperidin-4-yl, or (3-carboxy-1H-pyrazol-5-yl)methyl.

In some embodiments, R³ is H, methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl,(3-carboxy-1H-pyrazol-5-yl)methyl, 4-carboxybutyl,(4-carboxycyclohexyl)ethyl (e.g., (trans-4-carboxycyclohexyl)ethyl or(cis-4-carboxycyclohexyl)ethyl)), or 4-carboxy-4-methylcyclohexyl (e.g.,cis-4-carboxy-4-methylcyclohexyl or trans-4-carboxy-4-methylcyclohexyl).

In some embodiments, R³ is H, methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl, or(3-carboxy-1H-pyrazol-5-yl)methyl.

In some embodiments, R³ is methyl.

In some embodiments, R³ is ethyl.

In some embodiments, R³ is isopropyl.

In some embodiments, R³ is 1,3-dihydroxypropan-2-yl.

In some embodiments, R³ is 2,3-dihydroxypropyl.

In some embodiments, R³ is 2-hydroxypropyl.

In some embodiments, R³ is 2-hydroxyethyl.

In some embodiments, R³ is 3-hydroxypropyl.

In some embodiments, R³ is carboxymethyl.

In some embodiments, R³ is 3-carboxypropyl.

In some embodiments, R³ is 2-carboxy-2-methylpropyl.

In some embodiments, R³ is cyclobutyl.

In some embodiments, R³ is 4-hydroxycyclohexyl.

In some embodiments, R³ is (1-carboxycyclopropyl)methyl.

In some embodiments, R³ is (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl.

In some embodiments, R³ is (4-carboxybicyclo[2.2.1]heptan-1-yl)methyl.

In some embodiments, R³ is (4-carboxybicyclo[2.2.2]octan-1-yl)methyl.

In some embodiments, R³ is (3-carboxybicyclo[1.1.1]pentan-1-yl)methyl.

In some embodiments, R³ is 4-carboxyphenethyl.

In some embodiments, R³ is (1H-pyrazol-3-yl)methyl.

In some embodiments, R³ is tetrahydro-2H-pyran-4-yl.

In some embodiments, R³ is 1-carbamoylpiperidin-4-yl.

In some embodiments, R³ is 1-sulfamoylpiperidin-4-yl.

In some embodiments, R³ is (3-carboxy-1H-pyrazol-5-yl)methyl.

In some embodiments, R³ is 4-carboxybutyl.

In some embodiments, R³ is (4-carboxycyclohexyl)ethyl (e.g.,(trans-4-carboxycyclohexyl)ethyl or (cis-4-carboxycyclohexyl)ethyl)).

In some embodiments, R³ is 4-carboxy-4-methylcyclohexyl (e.g.,cis-4-carboxy-4-methylcyclohexyl or trans-4-carboxy-4-methylcyclohexyl).

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, whereinwherein:

R¹ is methyl, CN, F, Cl, or Br;

R² is methyl, CN, F, Cl, or Br; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, OH,CON(CH₃)₂, and CH₃.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl, CN, F, Cl, or Br;

R² is methyl, CN, F, Cl, or Br; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, andOH.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl or Cl;

R² is methyl, CN, or Cl; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, OH,CON(CH₃)₂, and CH₃.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl or Cl;

R² is methyl, CN, or Cl; and

R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, andOH.

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl or Cl;

R² is methyl, CN, or Cl; and

R³ is H, methyl, ethyl, isopropyl, 1,3-dihydroxypropan-2-yl,2,3-dihydroxypropyl, 2-hydroxypropyl, 2-hydroxyethyl, 3-hydroxypropyl,carboxymethyl, 3-carboxypropyl, 2-carboxy-2-methylpropyl, cyclobutyl,4-hydroxycyclohexyl, (1-carboxycyclopropyl)methyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl,(3-carboxy-1H-pyrazol-5-yl)methyl, 4-carboxybutyl,(4-carboxycyclohexyl)ethyl (e.g., (trans-4-carboxycyclohexyl)ethyl or(cis-4-carboxycyclohexyl)ethyl)), or 4-carboxy-4-methylcyclohexyl (e.g.,cis-4-carboxy-4-methylcyclohexyl or trans-4-carboxy-4-methylcyclohexyl).

In some embodiments, provided herein is a compound of Formula (I), or apharmaceutically acceptable salt or a stereoisomer thereof, wherein:

R¹ is methyl or Cl;

R² is methyl, CN, or Cl; and

R³ is H, methyl, ethyl, isopropyl, 1,3-dihydroxypropan-2-yl,2,3-dihydroxypropyl, 2-hydroxypropyl, 2-hydroxyethyl, 3-hydroxypropyl,carboxymethyl, 3-carboxypropyl, 2-carboxy-2-methylpropyl, cyclobutyl,4-hydroxycyclohexyl, (1-carboxycyclopropyl)methyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl, or(3-carboxy-1H-pyrazol-5-yl)methyl.

In some embodiments, provided herein is a compound is selected from:

-   4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-ethyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-isopropyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-cyclobutyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(1-methyl-5-(1-sulfamoylpiperidin-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-((1H-pyrazol-3-yl)methyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(1,3-dihydroxypropan-2-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(2,3-dihydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxy    ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(3-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4,4′-(((((2,2′-dichloro-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylic    acid);-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(carboxymethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(3-carboxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(2-carboxy-2-methylpropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-((1-carboxycyclopropyl)methyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.2]octane-1-carboxylic    acid;-   3-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[1.1.1]pentane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   5-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)-1H-pyrazole-3-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4,4′-(((((2-chloro-2′-methyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylic    acid);-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2′-chloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2′-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2′-chloro-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-cyano-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-cyano-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2-chloro-2′-cyano-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4,4′-(((((2-chloro-2′-cyano-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylic    acid);-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-cyano-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4,4′-(((((2,2′-dimethyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylic    acid);-   4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxy    cyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid; and-   4-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;    or a pharmaceutically acceptable salt or a stereoisomer thereof.

In some embodiments, provided herein is a compound selected from:

-   4-(2-(2-((3′-(5-(2-(4-carboxycyclohexyl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(4-carboxybutyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((2,2′-dichloro-3′-(5-(5-(dimethylamino)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;-   4-(2-(2-((3′-(5-(4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic    acid;    or a pharmaceutically acceptable salt or a stereoisomer thereof.

In some embodiments, provided herein is a compound of Formula I, whereinone or more hydrogen atoms are replaced by deuterium, or apharmaceutically acceptable salt or a stereoisomer thereof.

In some embodiments, the compound is selected from the examples providedherein.

It is further appreciated that certain features of the invention, whichare, for clarity, described in the context of separate embodiments, canalso be provided in combination in a single embodiment (while theembodiments are intended to be combined as if written in multiplydependent form). Conversely, various features of the invention whichare, for brevity, described in the context of a single embodiment, canalso be provided separately or in any suitable subcombination. Thus, itis contemplated as features described as embodiments of the compounds ofFormula (I) can be combined in any suitable combination.

At various places in the present specification, certain features of thecompounds are disclosed in groups or in ranges. It is specificallyintended that such a disclosure include each and every individualsubcombination of the members of such groups and ranges. For example,the term “C₁₋₆ alkyl” is specifically intended to individually disclose(without limitation) methyl, ethyl, C₃ alkyl, C₄ alkyl, C₅ alkyl and C₆alkyl.

The term “n-membered,” where n is an integer, typically describes thenumber of ring-forming atoms in a moiety where the number ofring-forming atoms is n. For example, piperidinyl is an example of a6-membered heterocycloalkyl ring, pyrazolyl is an example of a5-membered heteroaryl ring, pyridyl is an example of a 6-memberedheteroaryl ring and 1,2,3,4-tetrahydro-naphthalene is an example of a10-membered cycloalkyl group.

At various places in the present specification, variables definingdivalent linking groups may be described. It is specifically intendedthat each linking substituent include both the forward and backwardforms of the linking substituent. For example, —NR(CR′R″)_(n)— includesboth —NR(CR′R″)_(n)— and —(CR′R″)_(n)NR— and is intended to discloseeach of the forms individually. Where the structure requires a linkinggroup, the Markush variables listed for that group are understood to belinking groups. For example, if the structure requires a linking groupand the Markush group definition for that variable lists “alkyl” or“aryl” then it is understood that the “alkyl” or “aryl” represents alinking alkylene group or arylene group, respectively.

The term “substituted” means that an atom or group of atoms formallyreplaces hydrogen as a “substituent” attached to another group. The term“substituted”, unless otherwise indicated, refers to any level ofsubstitution, e.g., mono-, di-, tri-, tetra- or penta-substitution,where such substitution is permitted. The substituents are independentlyselected, and substitution may be at any chemically accessible position.It is to be understood that substitution at a given atom is limited byvalency. It is to be understood that substitution at a given atomresults in a chemically stable molecule. The phrase “optionallysubstituted” means unsubstituted or substituted. The term “substituted”means that a hydrogen atom is removed and replaced by a substituent. Asingle divalent substituent, e.g., oxo, can replace two hydrogen atoms.

The term “C_(n-m)” indicates a range which includes the endpoints,wherein n and m are integers and indicate the number of carbons.Examples include C₁₋₄, C₁₋₆ and the like.

The term “alkyl” employed alone or in combination with other terms,refers to a saturated hydrocarbon group that may be straight-chained orbranched. The term “C_(n-m) alkyl”, refers to an alkyl group having n tom carbon atoms. An alkyl group formally corresponds to an alkane withone C—H bond replaced by the point of attachment of the alkyl group tothe remainder of the compound. In some embodiments, the alkyl groupcontains from 1 to 6 carbon atoms, from 1 to 4 carbon atoms, from 1 to 3carbon atoms, or 1 to 2 carbon atoms. Examples of alkyl moietiesinclude, but are not limited to, chemical groups such as methyl, ethyl,n-propyl, isopropyl, n-butyl, tert-butyl, isobutyl, sec-butyl; higherhomologs such as 2-methyl-1-butyl, n-pentyl, 3-pentyl, n-hexyl,1,2,2-trimethylpropyl and the like.

The term “alkenyl” employed alone or in combination with other terms,refers to a straight-chain or branched hydrocarbon group correspondingto an alkyl group having one or more double carbon-carbon bonds. Analkenyl group formally corresponds to an alkene with one C—H bondreplaced by the point of attachment of the alkenyl group to theremainder of the compound. The term “C_(n-m) alkenyl” refers to analkenyl group having n to m carbons. In some embodiments, the alkenylmoiety contains 2 to 6, 2 to 4, or 2 to 3 carbon atoms. Example alkenylgroups include, but are not limited to, ethenyl, n-propenyl,isopropenyl, n-butenyl, sec-butenyl and the like.

The term “alkynyl” employed alone or in combination with other terms,refers to a straight-chain or branched hydrocarbon group correspondingto an alkyl group having one or more triple carbon-carbon bonds. Analkynyl group formally corresponds to an alkyne with one C—H bondreplaced by the point of attachment of the alkyl group to the remainderof the compound. The term “C_(n-m) alkynyl” refers to an alkynyl grouphaving n to m carbons. Example alkynyl groups include, but are notlimited to, ethynyl, propyn-1-yl, propyn-2-yl and the like. In someembodiments, the alkynyl moiety contains 2 to 6, 2 to 4, or 2 to 3carbon atoms.

The term “alkylene”, employed alone or in combination with other terms,refers to a divalent alkyl linking group. An alkylene group formallycorresponds to an alkane with two C—H bond replaced by points ofattachment of the alkylene group to the remainder of the compound.

The term “C_(n-m) alkylene” refers to an alkylene group having n to mcarbon atoms. Examples of alkylene groups include, but are not limitedto, ethan-1,2-diyl, propan-1,3-diyl, propan-1,2-diyl, butan-1,4-diyl,butan-1,3-diyl, butan-1,2-diyl, 2-methyl-propan-1,3-diyl and the like.

The term “alkoxy”, employed alone or in combination with other terms,refers to a group of formula —O-alkyl, wherein the alkyl group is asdefined above. The term “C_(n-m) alkoxy” refers to an alkoxy group, thealkyl group of which has n to m carbons. Example alkoxy groups includemethoxy, ethoxy, propoxy (e.g., n-propoxy and isopropoxy), t-butoxy andthe like. In some embodiments, the alkyl group has 1 to 6, 1 to 4, or 1to 3 carbon atoms.

The term “amino” refers to a group of formula —NH₂.

The term “carbamyl” refers to a group of formula —C(O)NH₂.

The term “carbonyl”, employed alone or in combination with other terms,refers to a —C(═O)— group, which also may be written as C(O).

The term “cyano” or “nitrile” refers to a group of formula —C═N, whichalso may be written as —CN.

The terms “halo” or “halogen”, used alone or in combination with otherterms, refers to fluoro, chloro, bromo and iodo. In some embodiments,“halo” refers to a halogen atom selected from F, Cl, or Br. In someembodiments, halo groups are F. In some embodiments, halo groups are Cl.

The term “haloalkyl” as used herein refers to an alkyl group in whichone or more of the hydrogen atoms has been replaced by a halogen atom.The term “C_(n-m) haloalkyl” refers to a C_(n-m) alkyl group having n tom carbon atoms and from at least one up to {2(n to m)+1} halogen atoms,which may either be the same or different. In some embodiments, thehalogen atoms are fluoro atoms. In some embodiments, the haloalkyl grouphas 1 to 6 or 1 to 4 carbon atoms. Example haloalkyl groups include CF₃,C₂F₅, CHF₂, CCl₃, CHCl₂, C₂Cl₅ and the like. In some embodiments, thehaloalkyl group is a fluoroalkyl group.

The term “haloalkoxy”, employed alone or in combination with otherterms, refers to a group of formula —O-haloalkyl, wherein the haloalkylgroup is as defined above. The term “C_(n-m) haloalkoxy” refers to ahaloalkoxy group, the haloalkyl group of which has n to m carbons.Example haloalkoxy groups include trifluoromethoxy and the like. In someembodiments, the haloalkoxy group has 1 to 6, 1 to 4, or 1 to 3 carbonatoms.

The term “oxo” refers to an oxygen atom as a divalent substituent,forming a carbonyl group when attached to carbon, or attached to aheteroatom forming a sulfoxide or sulfone group, or an N-oxide group. Insome embodiments, heterocyclic groups may be optionally substituted by 1or 2 oxo (═O) substituents.

The term “sulfido” refers to a sulfur atom as a divalent substituent,forming a thiocarbonyl group (C═S) when attached to carbon.

The term “aromatic” refers to a carbocycle or heterocycle having one ormore polyunsaturated rings having aromatic character (i.e., having(4n+2) delocalized π (pi) electrons where n is an integer).

The term “aryl,” employed alone or in combination with other terms,refers to an aromatic hydrocarbon group, which may be monocyclic orpolycyclic (e.g., having 2 fused rings). The term “C_(n-m) aryl” refersto an aryl group having from n to m ring carbon atoms. Aryl groupsinclude, e.g., phenyl, naphthyl, indanyl, indenyl and the like. In someembodiments, aryl groups have from 6 to about 10 carbon atoms. In someembodiments aryl groups have 6 carbon atoms. In some embodiments arylgroups have 10 carbon atoms. In some embodiments, the aryl group isphenyl. In some embodiments, the aryl group is naphthyl.

The term “heteroatom” used herein is meant to include boron, phosphorus,sulfur, oxygen and nitrogen.

The term “heteroaryl” or “heteroaromatic,” employed alone or incombination with other terms, refers to a monocyclic or polycyclicaromatic heterocycle having at least one heteroatom ring member selectedfrom boron, phosphorus, sulfur, oxygen and nitrogen. In someembodiments, the heteroaryl ring has 1, 2, 3 or 4 heteroatom ringmembers independently selected from nitrogen, sulfur and oxygen. In someembodiments, any ring-forming N in a heteroaryl moiety can be anN-oxide. In some embodiments, the heteroaryl has 5-14 ring atomsincluding carbon atoms and 1, 2, 3 or 4 heteroatom ring membersindependently selected from nitrogen, sulfur and oxygen. In someembodiments, the heteroaryl has 5-14, or 5-10 ring atoms includingcarbon atoms and 1, 2, 3 or 4 heteroatom ring members independentlyselected from nitrogen, sulfur and oxygen. In some embodiments, theheteroaryl has 5-6 ring atoms and 1 or 2 heteroatom ring membersindependently selected from nitrogen, sulfur and oxygen. In someembodiments, the heteroaryl is a five-membered or six-memberedheteroaryl ring. In other embodiments, the heteroaryl is aneight-membered, nine-membered or ten-membered fused bicyclic heteroarylring. Example heteroaryl groups include, but are not limited to,pyridinyl (pyridyl), pyrimidinyl, pyrazinyl, pyridazinyl, pyrrolyl,pyrazolyl, azolyl, oxazolyl, thiazolyl, imidazolyl, furanyl, thiophenyl,quinolinyl, isoquinolinyl, naphthyridinyl (including 1,2-, 1,3-, 1,4-,1,5-, 1,6-, 1,7-, 1,8-, 2,3- and 2,6-naphthyridine), indolyl,benzothiophenyl, benzofuranyl, benzisoxazolyl, imidazo[1,2-b]thiazolyl,purinyl, and the like.

A five-membered heteroaryl ring is a heteroaryl group having five ringatoms wherein one or more (e.g., 1, 2 or 3) ring atoms are independentlyselected from N, O and S. Exemplary five-membered ring heteroarylsinclude thienyl, furyl, pyrrolyl, imidazolyl, thiazolyl, oxazolyl,pyrazolyl, isothiazolyl, isoxazolyl, 1,2,3-triazolyl, tetrazolyl,1,2,3-thiadiazolyl, 1,2,3-oxadiazolyl, 1,2,4-triazolyl,1,2,4-thiadiazolyl, 1,2,4-oxadiazolyl, 1,3,4-triazolyl,1,3,4-thiadiazolyl and 1,3,4-oxadiazolyl.

A six-membered heteroaryl ring is a heteroaryl group having six ringatoms wherein one or more (e.g., 1, 2 or 3) ring atoms are independentlyselected from N, O and S. Exemplary six-membered ring heteroaryls arepyridyl, pyrazinyl, pyrimidinyl, triazinyl and pyridazinyl.

The term “cycloalkyl,” employed alone or in combination with otherterms, refers to a non-aromatic hydrocarbon ring system (monocyclic,bicyclic or polycyclic), including cyclized alkyl and alkenyl groups.The term “C_(n-m) cycloalkyl” refers to a cycloalkyl that has n to mring member carbon atoms. Cycloalkyl groups can include mono- orpolycyclic (e.g., having 2, 3 or 4 fused rings) groups and spirocycles.Cycloalkyl groups can have 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14ring-forming carbons (C₃₋₁₄). In some embodiments, the cycloalkyl grouphas 3 to 14 members, 3 to 10 members, 3 to 6 ring members, 3 to 5 ringmembers, or 3 to 4 ring members. In some embodiments, the cycloalkylgroup is monocyclic. In some embodiments, the cycloalkyl group ismonocyclic or bicyclic. In some embodiments, the cycloalkyl group is aC₃₋₆ monocyclic cycloalkyl group. Ring-forming carbon atoms of acycloalkyl group can be optionally oxidized to form an oxo or sulfidogroup. Cycloalkyl groups also include cycloalkylidenes. In someembodiments, cycloalkyl is cyclopropyl, cyclobutyl, cyclopentyl orcyclohexyl. Also included in the definition of cycloalkyl are moietiesthat have one or more aromatic rings fused (i.e., having a bond incommon with) to the cycloalkyl ring, e.g., benzo or thienyl derivativesof cyclopentane, cyclohexane and the like. A cycloalkyl group containinga fused aromatic ring can be attached through any ring-forming atomincluding a ring-forming atom of the fused aromatic ring. Examples ofcycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, cyclohexadienyl,cycloheptatrienyl, norbomyl, norpinyl, norcamyl, bicyclo[1.1.1]pentanyl,bicyclo[2.1.1]hexanyl, bicyclo[2.2.1]heptanyl, bicyclo[2.2.2]octanyl andthe like. In some embodiments, the cycloalkyl group is cyclopropyl,cyclobutyl, cyclopentyl, or cyclohexyl.

The term “heterocycloalkyl,” employed alone or in combination with otherterms, refers to a non-aromatic ring or ring system, which mayoptionally contain one or more alkenylene groups as part of the ringstructure, which has at least one heteroatom ring member independentlyselected from boron, nitrogen, sulfur, oxygen and phosphorus, and whichhas 4-14 ring members, 4-10 ring members, 4-7 ring members, or 4-6 ringmembers. Included within the term “heterocycloalkyl” are monocyclic 4-,5-, 6- and 7-membered heterocycloalkyl groups. Heterocycloalkyl groupscan include mono- or bicyclic or polycyclic (e.g., having two or threefused or bridged rings) ring systems or spirocycles. In someembodiments, the heterocycloalkyl group is a monocyclic group having 1,2 or 3 heteroatoms independently selected from nitrogen, sulfur andoxygen. Ring-forming carbon atoms and heteroatoms of a heterocycloalkylgroup can be optionally oxidized to form an oxo or sulfido group orother oxidized linkage (e.g., C(O), S(O), C(S) or S(O)₂, N-oxide etc.)or a nitrogen atom can be quaternized. The heterocycloalkyl group can beattached through a ring-forming carbon atom or a ring-formingheteroatom. In some embodiments, the heterocycloalkyl group contains 0to 3 double bonds. In some embodiments, the heterocycloalkyl groupcontains 0 to 2 double bonds. Also included in the definition ofheterocycloalkyl are moieties that have one or more aromatic rings fused(i.e., having a bond in common with) to the heterocycloalkyl ring, e.g.,benzo or thienyl derivatives of piperidine, morpholine, azepine, etc. Aheterocycloalkyl group containing a fused aromatic ring can be attachedthrough any ring-forming atom including a ring-forming atom of the fusedaromatic ring. Examples of heterocycloalkyl groups include azetidinyl,azepanyl, dihydrobenzofuranyl, dihydrofuranyl, dihydropyranyl,morpholino, 3-oxa-9-azaspiro[5.5]undecanyl,1-oxa-8-azaspiro[4.5]decanyl, piperidinyl, piperazinyl, oxopiperazinyl,pyranyl, pyrrolidinyl, quinuclidinyl, tetrahydrofuranyl,tetrahydropyranyl, 1,2,3,4-tetrahydroquinolinyl, tropanyl,4,5,6,7-tetrahydrothiazolo[5,4-c]pyridinyl, and thiomorpholino.

At certain places, the definitions or embodiments refer to specificrings (e.g., an azetidine ring, a pyridine ring, etc.). Unless otherwiseindicated, these rings can be attached to any ring member provided thatthe valency of the atom is not exceeded. For example, an azetidine ringmay be attached at any position of the ring, whereas an azetidin-3-ylring is attached at the 3-position.

The compounds described herein can be asymmetric (e.g., having one ormore stereocenters). All stereoisomers, such as enantiomers anddiastereomers, are intended unless otherwise indicated. Compounds of thepresent invention that contain asymmetrically substituted carbon atomscan be isolated in optically active or racemic forms. Methods on how toprepare optically active forms from optically inactive startingmaterials are known in the art, such as by resolution of racemicmixtures or by stereoselective synthesis. Many geometric isomers ofolefins, C═N double bonds and the like can also be present in thecompounds described herein, and all such stable isomers are contemplatedin the present invention. Cis and trans geometric isomers of thecompounds of the present invention are described and may be isolated asa mixture of isomers or as separated isomeric forms.

Resolution of racemic mixtures of compounds can be carried out by any ofnumerous methods known in the art. One method includes fractionalrecrystallization using a chiral resolving acid which is an opticallyactive, salt-forming organic acid. Suitable resolving agents forfractional recrystallization methods are, e.g., optically active acids,such as the D and L forms of tartaric acid, diacetyltartaric acid,dibenzoyltartaric acid, mandelic acid, malic acid, lactic acid or thevarious optically active camphorsulfonic acids such as β-camphorsulfonicacid. Other resolving agents suitable for fractional crystallizationmethods include stereoisomerically pure forms of α-methylbenzylamine(e.g., S and R forms, or diastereomerically pure forms),2-phenylglycinol, norephedrine, ephedrine, N-methylephedrine,cyclohexylethylamine, 1,2-diaminocyclohexane and the like.

Resolution of racemic mixtures can also be carried out by elution on acolumn packed with an optically active resolving agent (e.g.,dinitrobenzoylphenylglycine). Suitable elution solvent composition canbe determined by one skilled in the art.

In some embodiments, the compounds of the invention have the(R)-configuration. In other embodiments, the compounds have the(S)-configuration. In compounds with more than one chiral centers, eachof the chiral centers in the compound may be independently (R) or (S),unless otherwise indicated.

Compounds of the invention also include tautomeric forms. Tautomericforms result from the swapping of a single bond with an adjacent doublebond together with the concomitant migration of a proton. Tautomericforms include prototropic tautomers which are isomeric protonationstates having the same empirical formula and total charge. Exampleprototropic tautomers include ketone-enol pairs, amide-imidic acidpairs, lactam-lactim pairs, enamine-imine pairs, and annular forms wherea proton can occupy two or more positions of a heterocyclic system,e.g., 1H- and 3H-imidazole, 1H-, 2H- and 4H-1,2,4-triazole, 1H- and2H-isoindole and 1H- and 2H-pyrazole. Tautomeric forms can be inequilibrium or sterically locked into one form by appropriatesubstitution.

Compounds of the invention can also include all isotopes of atomsoccurring in the intermediates or final compounds. Isotopes includethose atoms having the same atomic number but different mass numbers.For example, isotopes of hydrogen include tritium and deuterium. One ormore constituent atoms of the compounds of the invention can be replacedor substituted with isotopes of the atoms in natural or non-naturalabundance. In some embodiments, the compound includes at least onedeuterium atom. For example, one or more hydrogen atoms in a compound ofthe present disclosure can be replaced or substituted by deuterium. Insome embodiments, the compound includes two or more deuterium atoms. Insome embodiments, the compound includes 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,11 or 12 deuterium atoms. Synthetic methods for including isotopes intoorganic compounds are known in the art.

The term, “compound,” as used herein is meant to include allstereoisomers, geometric isomers, tautomers and isotopes of thestructures depicted. The term is also meant to refer to compounds of theinventions, regardless of how they are prepared, e.g., synthetically,through biological process (e.g., metabolism or enzyme conversion), or acombination thereof.

All compounds, and pharmaceutically acceptable salts thereof, can befound together with other substances such as water and solvents (e.g.,hydrates and solvates) or can be isolated. When in the solid state, thecompounds described herein and salts thereof may occur in various formsand may, e.g., take the form of solvates, including hydrates. Thecompounds may be in any solid state form, such as a polymorph orsolvate, so unless clearly indicated otherwise, reference in thespecification to compounds and salts thereof should be understood asencompassing any solid state form of the compound.

In some embodiments, the compounds of the invention, or salts thereof,are substantially isolated. By “substantially isolated” is meant thatthe compound is at least partially or substantially separated from theenvironment in which it was formed or detected. Partial separation caninclude, e.g., a composition enriched in the compounds of the invention.Substantial separation can include compositions containing at leastabout 50%, at least about 60%, at least about 70%, at least about 80%,at least about 90%, at least about 95%, at least about 97%, or at leastabout 99% by weight of the compounds of the invention, or salt thereof.

The phrase “pharmaceutically acceptable” is employed herein to refer tothose compounds, materials, compositions and/or dosage forms which are,within the scope of sound medical judgment, suitable for use in contactwith the tissues of human beings and animals without excessive toxicity,irritation, allergic response, or other problem or complication,commensurate with a reasonable benefit/risk ratio.

The expressions, “ambient temperature” and “room temperature,” as usedherein, are understood in the art, and refer generally to a temperature,e.g., a reaction temperature, that is about the temperature of the roomin which the reaction is carried out, e.g., a temperature from about 20°C. to about 30° C.

The present invention also includes pharmaceutically acceptable salts ofthe compounds described herein. The term “pharmaceutically acceptablesalts” refers to derivatives of the disclosed compounds wherein theparent compound is modified by converting an existing acid or basemoiety to its salt form. Examples of pharmaceutically acceptable saltsinclude, but are not limited to, mineral or organic acid salts of basicresidues such as amines; alkali or organic salts of acidic residues suchas carboxylic acids; and the like. The pharmaceutically acceptable saltsof the present invention include the non-toxic salts of the parentcompound formed, e.g., from non-toxic inorganic or organic acids. Thepharmaceutically acceptable salts of the present invention can besynthesized from the parent compound which contains a basic or acidicmoiety by conventional chemical methods. Generally, such salts can beprepared by reacting the free acid or base forms of these compounds witha stoichiometric amount of the appropriate base or acid in water or inan organic solvent, or in a mixture of the two; generally, non-aqueousmedia like ether, ethyl acetate, alcohols (e.g., methanol, ethanol,iso-propanol or butanol) or acetonitrile (MeCN) are preferred. Lists ofsuitable salts are found in Remington's Pharmaceutical Sciences, 17^(th)Ed., (Mack Publishing Company, Easton, 1985), p. 1418, Berge et al., J.Pharm. Sci., 1977, 66(1), 1-19 and in Stahl et al., Handbook ofPharmaceutical Salts: Properties, Selection, and Use, (Wiley, 2002). Insome embodiments, the compounds described herein include the N-oxideforms.

II. Synthesis

Compounds of the invention, including salts thereof, can be preparedusing known organic synthesis techniques and can be synthesizedaccording to any of numerous possible synthetic routes.

The reactions for preparing compounds of the invention can be carriedout in suitable solvents which can be readily selected by one of skillin the art of organic synthesis. Suitable solvents can be substantiallynon-reactive with the starting materials (reactants), the intermediatesor products at the temperatures at which the reactions are carried out,e.g., temperatures which can range from the solvent's freezingtemperature to the solvent's boiling temperature. A given reaction canbe carried out in one solvent or a mixture of more than one solvent.Depending on the particular reaction step, suitable solvents for aparticular reaction step can be selected by the skilled artisan.

Preparation of compounds of the invention can involve the protection anddeprotection of various chemical groups. The need for protection anddeprotection, and the selection of appropriate protecting groups, can bereadily determined by one skilled in the art. The chemistry ofprotecting groups is described, e.g., in Kocienski, Protecting Groups,(Thieme, 2007); Robertson, Protecting Group Chemistry, (OxfordUniversity Press, 2000); Smith et al., March's Advanced OrganicChemistry: Reactions, Mechanisms, and Structure, 6^(th) Ed. (Wiley,2007); Peturssion et al., “Protecting Groups in Carbohydrate Chemistry,”J. Chem. Educ., 1997, 74(11), 1297; and Wuts et al., Protective Groupsin Organic Synthesis, 4th Ed., (Wiley, 2006).

Reactions can be monitored according to any suitable method known in theart. For example, product formation can be monitored by spectroscopicmeans, such as nuclear magnetic resonance spectroscopy (e.g., ¹H or¹³C), infrared spectroscopy, spectrophotometry (e.g., UV-visible), massspectrometry or by chromatographic methods such as high performanceliquid chromatography (HPLC) or thin layer chromatography (TLC).

Compounds of formula 1-8 can be synthesized using a process shown inScheme 1. Boc-protected compound 1-1 can be deprotected under acidicconditions (e.g., hydrochloric acid or trifluoroacetic acid) to provideamine 1-2. Palladium-catalyzed cross-coupling reaction ofhalo-substituted compound 1-2 with a boronic ester of formula 1-3 understandard conditions (such as Suzuki coupling reaction, e.g., in thepresence of a palladium catalyst and a suitable base) can producecompounds of formula 1-4. The reaction of amine 1-4 with methyl4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate 1-5 under reductiveamination conditions (e.g., sodium triacetoxyborohydride or sodiumcyanoborohydride as the reducing reagent) to generate compounds offormula 1-6. After removal of the Boc group of compound 1-6 under acidicconditions (e.g., hydrochloric acid or trifluoroacetic acid), the R³group can be introduced to the resulting amine by reductive aminationwith the corresponding aldehydes or ketones to generate compounds offormula 1-7. Then ester 1-7 can be hydrolyzed under alkaline conditionsto provide the desired compounds of formula 1-8.

Compounds of formula 2-4 can be synthesized using a process shown inScheme 2. The free amine in compound 2-1 can be protected with Boc. Theresulting compound can be deprotonated by a strong base such as, but notlimited to, n-butyl lithium to generate the corresponding heteroaryllithium intermediate, which can further react with an alkylchloroformateto give esters of formula 2-2. The reaction of ester 2-2 withhalo-substituted aniline 2-3 in the presence of a suitable base such as,but not limited to, potassium tert-butoxide can furnish the desiredcompounds of formula 2-4.

Compounds of formula 3-2 can be prepared according to Scheme 3.Halo-substituted compound 3-1 can be converted to the boronic ester 3-2under standard conditions [e.g., in the presence ofbis(pinacolato)diboron and a palladium catalyst, such as,tetrakis(triphenylphosphine) palladium(0) and palladium(II) acetate].

Compound 4-4 can be prepared according to Scheme 4. Alcohol 4-1 can beconverted to aldehyde 4-2 in the presence of an oxidant such as, but notlimited to, Dess-Martin periodinane or pyridinium chlorochromate.Aldehyde 4-2 can be extended by one carbon atom in a Wittig reactionwith (methoxymethyl)triphenylphosphonium chloride 4-3 to form an enolether, which can be further hydrolyzed under acidic conditions (e.g.,hydrochloric acid) to provide the desired compound 4-4.

III. Uses of the Compounds

Compounds of the present disclosure can inhibit the activity ofPD-1/PD-L1 protein/protein interaction and, thus, are useful in treatingdiseases and disorders associated with activity of PD-1 and the diseasesand disorders associated with PD-L1 including its interaction with otherproteins such as PD-1 and B7-1 (CD80). In certain embodiments, thecompounds of the present disclosure, or pharmaceutically acceptablesalts or stereoisomers thereof, are useful for therapeuticadministration to enhance, stimulate and/or increase immunity in cancer,chronic infection or sepsis, including enhancement of response tovaccination. In some embodiments, the present disclosure provides amethod for inhibiting the PD-1/PD-L1 protein/protein interaction. Themethod includes administering to an individual or a patient a compoundof Formula (I) or of any of the formulas as described herein, or of acompound as recited in any of the claims and described herein, or apharmaceutically acceptable salt or a stereoisomer thereof. Thecompounds of the present disclosure can be used alone, in combinationwith other agents or therapies or as an adjuvant or neoadjuvant for thetreatment of diseases or disorders, including cancer or infectiondiseases. For the uses described herein, any of the compounds of thedisclosure, including any of the embodiments thereof, may be used.

The compounds of the present disclosure inhibit the PD-1/PD-L1protein/protein interaction, resulting in a PD-1 pathway blockade. Theblockade of PD-1 can enhance the immune response to cancerous cells andinfectious diseases in mammals, including humans. In some embodiments,the present disclosure provides treatment of an individual or a patientin vivo using a compound of Formula (I) or a salt or stereoisomerthereof such that growth of cancerous tumors is inhibited. A compound ofFormula (I) or of any of the formulas as described herein, or a compoundas recited in any of the claims and described herein, or a salt orstereoisomer thereof, can be used to inhibit the growth of canceroustumors. Alternatively, a compound of Formula (I) or of any of theformulas as described herein, or a compound as recited in any of theclaims and described herein, or a salt or stereoisomer thereof, can beused in conjunction with other agents or standard cancer treatments, asdescribed below. In one embodiment, the present disclosure provides amethod for inhibiting growth of tumor cells in vitro. The methodincludes contacting the tumor cells in vitro with a compound of Formula(I) or of any of the formulas as described herein, or of a compound asrecited in any of the claims and described herein, or of a salt orstereoisomer thereof. In another embodiment, the present disclosureprovides a method for inhibiting growth of tumor cells in an individualor a patient. The method includes administering to the individual orpatient in need thereof a therapeutically effective amount of a compoundof Formula (I) or of any of the formulas as described herein, or of acompound as recited in any of the claims and described herein, or a saltor a stereoisomer thereof.

In some embodiments, provided herein is a method for treating cancer.The method includes administering to a patient in need thereof, atherapeutically effective amount of a compound of Formula (I) or any ofthe formulas as described herein, a compound as recited in any of theclaims and described herein, or a salt thereof. Examples of cancersinclude those whose growth may be inhibited using compounds of thedisclosure and cancers typically responsive to immunotherapy.

In some embodiments, the present disclosure provides a method ofenhancing, stimulating and/or increasing the immune response in apatient. The method includes administering to the patient in needthereof a therapeutically effective amount of a compound of Formula (I)or any of the formulas as described herein, a compound or composition asrecited in any of the claims and described herein, or a salt thereof.

Examples of cancers that are treatable using the compounds of thepresent disclosure include, but are not limited to, bone cancer,pancreatic cancer, skin cancer, cancer of the head or neck, cutaneous orintraocular malignant melanoma, uterine cancer, ovarian cancer, rectalcancer, cancer of the anal region, stomach cancer, testicular cancer,uterine cancer, carcinoma of the fallopian tubes, carcinoma of theendometrium, endometrial cancer, carcinoma of the cervix, carcinoma ofthe vagina, carcinoma of the vulva, Hodgkin's Disease, non-Hodgkin'slymphoma, cancer of the esophagus, cancer of the small intestine, cancerof the endocrine system, cancer of the thyroid gland, cancer of theparathyroid gland, cancer of the adrenal gland, sarcoma of soft tissue,cancer of the urethra, cancer of the penis, chronic or acute leukemiasincluding acute myeloid leukemia, chronic myeloid leukemia, acutelymphoblastic leukemia, chronic lymphocytic leukemia, solid tumors ofchildhood, lymphocytic lymphoma, cancer of the bladder, cancer of thekidney or urethra, carcinoma of the renal pelvis, neoplasm of thecentral nervous system (CNS), primary CNS lymphoma, tumor angiogenesis,spinal axis tumor, brain stem glioma, pituitary adenoma, Kaposi'ssarcoma, epidermoid cancer, squamous cell cancer, T-cell lymphoma,environmentally induced cancers including those induced by asbestos, andcombinations of said cancers. The compounds of the present disclosureare also useful for the treatment of metastatic cancers, especiallymetastatic cancers that express PD-L1.

In some embodiments, cancers treatable with compounds of the presentdisclosure include melanoma (e.g., metastatic malignant melanoma,cutaneous melanoma), renal cancer (e.g. clear cell carcinoma), prostatecancer (e.g. hormone refractory prostate adenocarcinoma), breast cancer(e.g., breast invasive carcinoma), colon cancer, lung cancer (e.g.non-small cell lung cancer and small cell lung cancer), squamous cellhead and neck cancer (e.g., squamous cell carcinoma of the head andneck), urothelial cancer (e.g., bladder cancer, nonmuscle invasivebladder cancer (NMIBC)) and cancers with high microsatellite instability(MSI^(high)). Additionally, the disclosure includes refractory orrecurrent malignancies whose growth may be inhibited using the compoundsof the disclosure.

In some embodiments, cancers that are treatable using the compounds ofthe present disclosure include, but are not limited to, solid tumors(e.g., prostate cancer, colon cancer, esophageal cancer, endometrialcancer, ovarian cancer, uterine cancer, renal cancer, hepatic cancer,pancreatic cancer, gastric cancer, breast cancer, lung cancer, cancersof the head and neck, thyroid cancer, glioblastoma, sarcoma, bladdercancer, etc.), hematological cancers (e.g., lymphoma, leukemia such asacute lymphoblastic leukemia (ALL), acute myelogenous leukemia (AML),chronic lymphocytic leukemia (CLL), chronic myelogenous leukemia (CML),DLBCL, mantle cell lymphoma, Non-Hodgkin lymphoma (including relapsed orrefractory NHL and recurrent follicular), Hodgkin lymphoma or multiplemyeloma) and combinations of said cancers.

In some embodiments, cancers that are treatable using the compounds ofthe present disclosure include, but are not limited to,cholangiocarcinoma, bile duct cancer, biliary tract cancer, triplenegative breast cancer, rhabdomyosarcoma, small cell lung cancer,leiomyosarcoma, hepatocellular carcinoma, Ewing's sarcoma, brain cancer,brain tumor, astrocytoma, neuroblastoma, neurofibroma, basal cellcarcinoma, chondrosarcoma, epithelioid sarcoma, eye cancer, Fallopiantube cancer, gastrointestinal cancer, gastrointestinal stromal tumors,hairy cell leukemia, intestinal cancer, islet cell cancer, oral cancer,mouth cancer, throat cancer, laryngeal cancer, lip cancer, mesothelioma,neck cancer, nasal cavity cancer, ocular cancer, ocular melanoma, pelviccancer, rectal cancer, renal cell carcinoma, salivary gland cancer,sinus cancer, spinal cancer, tongue cancer, tubular carcinoma, urethralcancer, and ureteral cancer.

In some embodiments, the compounds of the present disclosure can be usedto treat sickle cell disease and sickle cell anemia.

In some embodiments, diseases and indications that are treatable usingthe compounds of the present disclosure include, but are not limited tohematological cancers, sarcomas, lung cancers, gastrointestinal cancers,genitourinary tract cancers, liver cancers, bone cancers, nervous systemcancers, gynecological cancers, and skin cancers.

Exemplary hematological cancers include lymphomas and leukemias such asacute lymphoblastic leukemia (ALL), acute myelogenous leukemia (AML),acute promyelocytic leukemia (APL), chronic lymphocytic leukemia (CLL),chronic myelogenous leukemia (CML), diffuse large B-cell lymphoma(DLBCL), mantle cell lymphoma, Non-Hodgkin lymphoma (including relapsedor refractory NHL and recurrent follicular), Hodgkin lymphoma,myeloproliferative diseases (e.g., primary myelofibrosis (PMF),polycythemia vera (PV), and essential thrombocytosis (ET)),myelodysplasia syndrome (MDS), T-cell acute lymphoblastic lymphoma(T-ALL) and multiple myeloma (MM).

Exemplary sarcomas include chondrosarcoma, Ewing's sarcoma,osteosarcoma, rhabdomyosarcoma, angiosarcoma, fibrosarcoma, liposarcoma,myxoma, rhabdomyoma, rhabdosarcoma, fibroma, lipoma, harmatoma, andteratoma.

Exemplary lung cancers include non-small cell lung cancer (NSCLC) (e.g.,squamous cell NSCLC), small cell lung cancer, bronchogenic carcinoma(squamous cell, undifferentiated small cell, undifferentiated largecell, adenocarcinoma), alveolar (bronchiolar) carcinoma, bronchialadenoma, chondromatous hamartoma, and mesothelioma.

Exemplary gastrointestinal cancers include cancers of the esophagus(carcinoma, squamous cell carcinoma, adenocarcinoma, leiomyosarcoma,lymphoma), stomach (carcinoma, lymphoma, leiomyosarcoma,adenocarcinoma), pancreas (ductal adenocarcinoma, insulinoma,glucagonoma, gastrinoma, carcinoid tumors, vipoma), small bowel(adenocarcinoma, lymphoma, carcinoid tumors, Kaposi's sarcoma,leiomyoma, hemangioma, lipoma, neurofibroma, fibroma), large bowel(adenocarcinoma, tubular adenoma, villous adenoma, hamartoma,leiomyoma), and colorectal cancer (e.g., colorectal adenocarcinoma).

Exemplary genitourinary tract cancers include cancers of the kidney(adenocarcinoma, Wilm's tumor [nephroblastoma]), bladder and urethra(squamous cell carcinoma, transitional cell carcinoma, adenocarcinoma),prostate (adenocarcinoma, sarcoma), and testis (seminoma, teratoma,embryonal carcinoma, teratocarcinoma, choriocarcinoma, sarcoma,interstitial cell carcinoma, fibroma, fibroadenoma, adenomatoid tumors,lipoma). In some embodiments, the cancer is a urological cancer (e.g.,papillary kidney carcinoma, testicular germ cell cancer, chromophoberenal cell carcinoma, clear cell renal carcinoma, or prostateadenocarcinoma).

Exemplary liver cancers include hepatoma (hepatocellular carcinoma),cholangiocarcinoma, hepatoblastoma, angiosarcoma, hepatocellularadenoma, and hemangioma.

Exemplary bone cancers include, for example, osteogenic sarcoma(osteosarcoma), fibrosarcoma, malignant fibrous histiocytoma,chondrosarcoma, Ewing's sarcoma, malignant lymphoma (reticulum cellsarcoma), multiple myeloma, malignant giant cell tumor chordoma,osteochronfroma (osteocartilaginous exostoses), benign chondroma,chondroblastoma, chondromyxofibroma, osteoid osteoma, and giant celltumors

Exemplary nervous system cancers include cancers of the skull (osteoma,hemangioma, granuloma, xanthoma, osteitis deformans), meninges(meningioma, meningiosarcoma, gliomatosis), brain (astrocytoma,meduoblastoma, glioma, ependymoma, germinoma (pinealoma), glioblastoma,glioblastoma multiform, oligodendroglioma, schwannoma, retinoblastoma,congenital tumors), and spinal cord (neurofibroma, meningioma, glioma,sarcoma), as well as neuroblastoma and Lhermitte-Duclos disease.

Exemplary gynecological cancers include cancers of the uterus(endometrial carcinoma), cervix (cervical carcinoma, pre-tumor cervicaldysplasia), ovaries (ovarian carcinoma (serous cystadenocarcinoma,serous adenocarcinoma, mucinous cystadenocarcinoma, unclassifiedcarcinoma), granulosa-thecal cell tumors, Sertoli-Leydig cell tumors,dysgerminoma, malignant teratoma), vulva (squamous cell carcinoma,intraepithelial carcinoma, adenocarcinoma, fibrosarcoma, melanoma),vagina (clear cell carcinoma, squamous cell carcinoma, botryoid sarcoma(embryonal rhabdomyosarcoma), and fallopian tubes (carcinoma).

Exemplary skin cancers include melanoma, basal cell carcinoma, squamouscell carcinoma (e.g., cutaneous squamous cell carcinoma), Kaposi'ssarcoma, moles dysplastic nevi, lipoma, angioma, dermatofibroma, andkeloids. In some embodiments, diseases and indications that aretreatable using the compounds of the present disclosure include, but arenot limited to, sickle cell disease (e.g., sickle cell anemia),triple-negative breast cancer (TNBC), myelodysplastic syndromes,testicular cancer, bile duct cancer, esophageal cancer, and urothelialcarcinoma.

PD-1 pathway blockade with compounds of the present disclosure can alsobe used for treating infections such as viral, bacteria, fungus andparasite infections. The present disclosure provides a method fortreating infections such as viral infections. The method includesadministering to a patient in need thereof, a therapeutically effectiveamount of a compound of Formula (I) or any of the formulas as describedherein, a compound as recited in any of the claims and described herein,a salt thereof. Examples of viruses causing infections treatable bymethods of the present disclosure include, but are not limit to, humanimmunodeficiency virus, human papillomavirus, influenza, hepatitis A, B,C or D viruses, adenovirus, poxvirus, herpes simplex viruses, humancytomegalovirus, severe acute respiratory syndrome virus, ebola virus,and measles virus. In some embodiments, viruses causing infectionstreatable by methods of the present disclosure include, but are notlimit to, hepatitis (A, B, or C), herpes virus (e.g., VZV, HSV-1, HAV-6,HSV-II, and CMV, Epstein Barr virus), adenovirus, influenza virus,flaviviruses, echovirus, rhinovirus, coxsackie virus, coronavirus,respiratory syncytial virus, mumps virus, rotavirus, measles virus,rubella virus, parvovirus, vaccinia virus, HTLV virus, dengue virus,papillomavirus, molluscum virus, poliovirus, rabies virus, JC virus,tuberculosis and arboviral encephalitis virus.

The present disclosure provides a method for treating bacterialinfections. The method includes administering to a patient in needthereof, a therapeutically effective amount of a compound of Formula (I)or any of the formulas as described herein, a compound as recited in anyof the claims and described herein, or a salt thereof. Non-limitingexamples of pathogenic bacteria causing infections treatable by methodsof the disclosure include chlamydia, rickettsial bacteria, mycobacteria,staphylococci, streptococci, pneumococci, meningococci and conococci,klebsiella, proteus, serratia, pseudomonas, legionella, diphtheria,salmonella, bacilli, cholera, tetanus, botulism, anthrax, plague,leptospirosis, and Lyme's disease bacteria.

The present disclosure provides a method for treating fungus infections.The method includes administering to a patient in need thereof, atherapeutically effective amount of a compound of Formula (I) or any ofthe formulas as described herein, a compound as recited in any of theclaims and described herein, or a salt thereof. Non-limiting examples ofpathogenic fungi causing infections treatable by methods of thedisclosure include Candida (albicans, krusei, glabrata, tropicalis,etc.), Cryptococcus neoformans, Aspergillus (fumigatus, niger, etc.),Genus Mucorales (mucor, absidia, rhizophus), Sporothrix schenkii,Blastomyces dermatitidis, Paracoccidioides brasiliensis, Coccidioidesimmitis and Histoplasma capsulatum.

The present disclosure provides a method for treating parasiteinfections. The method includes administering to a patient in needthereof, a therapeutically effective amount of a compound of Formula (I)or any of the formulas as described herein, a compound as recited in anyof the claims and described herein, or a salt thereof. Non-limitingexamples of pathogenic parasites causing infections treatable by methodsof the disclosure include Entamoeba histolytica, Balantidium coli,Naegleriafowleri, Acanthamoeba sp., Giardia lambia, Cryptosporidium sp.,Pneumocystis carinii, Plasmodium vivax, Babesia microti, Trypanosomabrucei, Trypanosoma cruzi, Leishmania donovani, Toxoplasma gondi, andNippostrongylus brasiliensis.

The present disclosure provides a method for treating neurodegenerativediseases or disorders. The method includes administering to a patient inneed thereof, a therapeutically effective amount of a compound ofFormula (I) or any of the formulas as described herein, a compound asrecited in any of the claims and described herein, or a salt thereof.Non-limiting examples of neurodegenerative diseases or disorders includeAlzheimer's disease, Parkinson's disease, Huntington's disease, priondisease, Motor neurone diseases, Spinocerebellar ataxia and Spinalmuscular atrophy.

It is believed that compounds of Formula (I), or any of the embodimentsthereof, may possess satisfactory pharmacological profile and promisingbiopharmaceutical properties, such as toxicological profile, metabolismand pharmacokinetic properties, solubility, and permeability. It will beunderstood that determination of appropriate biopharmaceuticalproperties is within the knowledge of a person skilled in the art, e.g.,determination of cytotoxicity in cells or inhibition of certain targetsor channels to determine potential toxicity.

The terms “individual” or “patient,” used interchangeably, refer to anyanimal, including mammals, preferably mice, rats, other rodents,rabbits, dogs, cats, swine, cattle, sheep, horses, or primates, and mostpreferably humans.

The phrase “therapeutically effective amount” refers to the amount ofactive compound or pharmaceutical agent that elicits the biological ormedicinal response in a tissue, system, animal, individual or human thatis being sought by a researcher, veterinarian, medical doctor or otherclinician.

As used herein, the term “treating” or “treatment” refers to one or moreof (1) inhibiting the disease; e.g., inhibiting a disease, condition ordisorder in an individual who is experiencing or displaying thepathology or symptomatology of the disease, condition or disorder (i.e.,arresting further development of the pathology and/or symptomatology);and (2) ameliorating the disease; e.g., ameliorating a disease,condition or disorder in an individual who is experiencing or displayingthe pathology or symptomatology of the disease, condition or disorder(i.e., reversing the pathology and/or symptomatology) such as decreasingthe severity of disease.

In some embodiments, the compounds of the invention are useful inpreventing or reducing the risk of developing any of the diseasesreferred to herein; e.g., preventing or reducing the risk of developinga disease, condition or disorder in an individual who may be predisposedto the disease, condition or disorder but does not yet experience ordisplay the pathology or symptomatology of the disease.

Combination Therapies

Immune-Checkpoint Therapies

Compounds of the present disclosure can be used in combination with oneor more immune checkpoint inhibitors for the treatment of diseases, suchas cancer or infections. Exemplary immune checkpoint inhibitors includeinhibitors against immune checkpoint molecules such as CBL-B, CD20,CD122, CD96, CD73, CD47, CSF1R, JAK, PI3K delta, PI3K gamma, TAM,arginase, HPK1, A2AR, B7-H3, B7-H4, BTLA, CTLA-4, LAG3, TIM3, TIGIT,CD112R, VISTA, PD-1, PD-L1 and PD-L2. In some embodiments, the immunecheckpoint molecule is a stimulatory checkpoint molecule selected fromCD27, CD28, CD40, ICOS, OX40, GITR and CD137 (4-1BB). In someembodiments, the immune checkpoint molecule is an inhibitory checkpointmolecule selected from A2AR, B7-H3, B7-H4, BTLA, CTLA-4, IDO, KIR, LAG3,PD-1, TIM3, TIGIT, and VISTA. In some embodiments, the compoundsprovided herein can be used in combination with one or more agentsselected from KIR inhibitors, TIGIT inhibitors, LAIR1 inhibitors, CD160inhibitors, 2B4 inhibitors and TGF beta inhibitors.

In some embodiments, the compounds provided herein can be used incombination with one or more agonists of immune checkpoint molecules,e.g., OX40, CD27, GITR, and CD137 (also known as 4-1BB).

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of OX40, CD27, CD28, GITR, ICOS, CD40, TLR7/8, and CD137 (alsoknown as 4-1BB).

In some embodiments, the agonist of CD137 is urelumab. In someembodiments, the agonist of CD137 is utomilumab.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of CD40. In some embodiments, the agonist of CD40 is CP-870893,ADC-1013, CDX-1140, SEA-CD40, RO7009789, JNJ-64457107, APX-005M, or ChiLob 7/4.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of ICOS. In some embodiments, the agonist of ICOS isGSK-3359609, JTX-2011, or MEDI-570.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of CD28. In some embodiments, the agonist of CD28 istheralizumab.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of CD27. In some embodiments, the agonist of CD27 is varlilumab.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of TLR7/8. In some embodiments, the agonist of TLR7/8 isMEDI9197.

In some embodiments, the inhibitor of an immune checkpoint molecule isanti-PD1 antibody, anti-PD-L1 antibody, or anti-CTLA-4 antibody.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of PD-1, e.g., an anti-PD-1 monoclonal antibody. In someembodiments, the anti-PD-1 monoclonal antibody is nivolumab,pembrolizumab (also known as MK-3475), pidilizumab, cemiplimab,spartalizumab, camrelizumab, cetrelimab, toripalimab, sintilimab,SHR-1210, PDR001, MGA012, PDR001, AB122, AMP-224, JTX-4014, BGB-108,BCD-100, BAT1306, LZM009, AK105, HLX10, or TSR-042. In some embodiments,the anti-PD-1 monoclonal antibody is nivolumab or pembrolizumab. In someembodiments, the anti-PD1 antibody is pembrolizumab. In someembodiments, the anti-PD-1 monoclonal antibody is MGA012. In someembodiments, the anti-PD1 antibody is SHR-1210. Other anti-canceragent(s) include antibody therapeutics such as 4-1BB (e.g. urelumab,utomilumab).

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of PD-L1, e.g., an anti-PD-L1 monoclonal antibody. In someembodiments, the anti-PD-L1 monoclonal antibody is BMS-935559, MEDI4736,MPDL3280A (also known as RG7446), durvalumab (Imfinzi®), atezolizumab(Tecentriq®), Avelumab (Bavencio®), MSB0010718C, tislelizumab, FAZ053,KN035, CS1001, SHR-1316, CBT-502, A167, STI-A101, CK-301, BGB-A333,MSB-2311, HLX20, or LY3300054. In some embodiments, the anti-PD-L1monoclonal antibody is MPDL3280A or MEDI4736.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of PD-1 and PD-L1, e.g., an anti-PD-1/PD-L1 bispecificantibody. In some embodiments, the anti-PD-1/PD-L1 bispecific antibodyis MCLA-136.

In some embodiments, the inhibitor is MCLA-145.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of CTLA-4, e.g., an anti-CTLA-4 antibody. In someembodiments, the anti-CTLA-4 antibody is ipilimumab, tremelimumab,AGEN1884, or CP-675,206.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of PD-1 and CTLA-4, e.g., an anti-PD-1/CTLA-4 bispecificantibody. In some embodiments, the anti-PD-1/CTLA-4 antibody is AK104.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of LAG3, e.g., an anti-LAG3 antibody. In some embodiments,the anti-LAG3 antibody is BMS-986016, LAG525, INCAGN2385, or eftilagimodalpha (IMP321).

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of CD73. In some embodiments, the inhibitor of CD73 isoleclumab. In some embodiments, the inhibitor of CD73 is MEDI9447.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of TIGIT. In some embodiments, the inhibitor of TIGIT isOMP-31M32.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of VISTA. In some embodiments, the inhibitor of VISTA isJNJ-61610588 or CA-170.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of B7-H3. In some embodiments, the inhibitor of B7-H3 isenoblituzumab, MGD009, or 8H9.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of KIR. In some embodiments, the inhibitor of KIR islirilumab or IPH4102.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of A2aR. In some embodiments, the inhibitor of A2aR isCPI-444.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of TGF-beta. In some embodiments, the inhibitor of TGF-betais trabedersen, galusertinib, or M7824.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of PI3K-gamma. In some embodiments, the inhibitor ofPI3K-gamma is IPI-549.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of CD47. In some embodiments, the inhibitor of CD47 isHu5F9-G4 or TTI-621.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of CD70. In some embodiments, the inhibitor of CD70 iscusatuzumab or BMS-936561.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of TIM3, e.g., an anti-TIM3 antibody. In some embodiments,the anti-TIM3 antibody is INCAGN2390, MBG453, or TSR-022.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of GITR, e.g., an anti-GITR antibody. In some embodiments, theagonist is TRX518, MK-4166, INCAGN1876, MK-1248, AMG228, BMS-986156,GWN323, MEDI1873, or MEDI6469.

In some embodiments, the agonist of an immune checkpoint molecule is anagonist of OX40, e.g., OX40 agonist antibody or OX40L fusion protein. Insome embodiments, the anti-OX40 antibody is MEDI0562, MOXR-0916,PF-04518600, GSK3174998, BMS-986178, or 9B12. In some embodiments, theOX40L fusion protein is MEDI6383.

In some embodiments, the inhibitor of an immune checkpoint molecule isan inhibitor of CD20, e.g., an anti-CD20 antibody. In some embodiments,the anti-CD20 antibody is obinutuzumab or rituximab.

The compounds of the present disclosure can be used in combination withbispecific antibodies. In some embodiments, one of the domains of thebispecific antibody targets PD-1, PD-L1, CTLA-4, GITR, OX40, TIM3, LAG3,CD137, ICOS, CD3 or TGFβ receptor. In some embodiments, the bispecificantibody binds to PD-1 and PD-L1. In some embodiments, the bispecificantibody that binds to PD-1 and PD-L1 is MCLA-136. In some embodiments,the bispecific antibody binds to PD-L1 and CTLA-4. In some embodiments,the bispecific antibody that binds to PD-L1 and CTLA-4 is AK104.

In some embodiments, the compounds of the disclosure can be used incombination with one or more metabolic enzyme inhibitors. In someembodiments, the metabolic enzyme inhibitor is an inhibitor of IDO1,TDO, or arginase. Examples of IDO1 inhibitors include epacadostat,NLG919, BMS-986205, PF-06840003, IOM2983, RG-70099 and LY338196.

As provided throughout, the additional compounds, inhibitors, agents,etc. can be combined with the present compound in a single or continuousdosage form, or they can be administered simultaneously or sequentiallyas separate dosage forms.

II. Cancer Therapies

Cancer cell growth and survival can be impacted by dysfunction inmultiple biological pathways. Thus, it may be useful to combineinhibitors of different mechanisms, such as enzyme inhibitors, signaltransduction inhibitors, inhibitors of chromatin dynamics or modulatorsof immune responses, to treat such conditions. Targeting more than onesignaling pathway (or more than one biological molecule involved in agiven signaling pathway) may reduce the likelihood of drug-resistancearising in a cell population, or reduce the toxicity of treatment.

The compounds of the present disclosure can be used in combination withone or more other therapies for the treatment of diseases, such ascancer or infections. Examples of diseases and indications treatablewith combination therapies include those as described herein. Examplesof cancers include solid tumors and non-solid tumors, such as liquidtumors, blood cancers. Examples of infections include viral infections,bacterial infections, fungus infections or parasite infections. Forexample, the compounds of the present disclosure can be combined withone or more inhibitors of the following kinases for the treatment ofcancer: Akt1, Akt2, Akt3, BCL2, CDK, TGF-βR, PKA, PKG, PKC, CaM-kinase,phosphorylase kinase, MEKK, ERK, MAPK, mTOR, EGFR, HER2, HER3, HER4,INS-R, IDH2, IGF-1R, IR-R, PDGFαR, PDGFβR, PI3K (alpha, beta, gamma,delta, and multiple or selective), CSF1R, KIT, FLK-II, KDR/FLK-1, FLK-4,fit-1, FGFR1, FGFR2, FGFR3, FGFR4, c-Met, PARP, Ron, Sea, TRKA, TRKB,TRKC, TAM kinases (Axl, Mer, Tyro3), FLT3, VEGFR/Flt2, Flt4, EphA1,EphA2, EphA3, EphB2, EphB4, Tie2, Src, Fyn, Lck, Fgr, Btk, Fak, SYK,FRK, JAK, ABL, ALK and B-Raf. In some embodiments, the compounds of thepresent disclosure can be combined with one or more of the followinginhibitors for the treatment of cancer or infections. Non-limitingexamples of inhibitors that can be combined with the compounds of thepresent disclosure for treatment of cancer and infections include anFGFR inhibitor (FGFR1, FGFR2, FGFR3 or FGFR4, e.g., pemigatinib(INCY54828), INCB62079), an EGFR (also known as ErB-1 or HER-1)inhibitor (e.g. erlotinib, gefitinib, vandetanib, orsimertinib,cetuximab, necitumumab, or panitumumab), a VEGFR inhibitor or pathwayblocker (e.g. bevacizumab, pazopanib, sunitinib, sorafenib, axitinib,regorafenib, ponatinib, cabozantinib, vandetanib, ramucirumab,lenvatinib, ziv-aflibercept), a PARP inhibitor (e.g. olaparib,rucaparib, veliparib or niraparib), a JAK inhibitor (JAK1 and/or JAK2,e.g., ruxolitinib, baricitinib or itacitinib (INCB39110)), an IDOinhibitor (e.g., epacadostat, NLG919, or BMS-986205, MK7162), an LSD1inhibitor (e.g., INCB59872 and INCB60003), a TDO inhibitor, a PI3K-deltainhibitor (e.g., Parsaclisib (INCB50465) and INCB50797), a PI3K-gammainhibitor such as PI3K-gamma selective inhibitor, a Pim inhibitor (e.g.,INCB53914), an EGFR inhibitor (also known as ErB-1 or HER-1; e.g.erlotinib, gefitinib, vandetanib, orsimertinib, cetuximab, necitumumab,or panitumumab), a VEGFR inhibitor or pathway blocker (e.g. bevacizumab,pazopanib, sunitinib, sorafenib, axitinib, regorafenib, ponatinib,cabozantinib, vandetanib, ramucirumab, lenvatinib, ziv-aflibercept), aPARP inhibitor (e.g. olaparib, rucaparib, veliparib, talazoparib, orniraparib), a CSF1R inhibitor, a TAM receptor tyrosine kinase (Tyro-3,Axl, and Mer), an adenosine receptor antagonist (e.g., A2a/A2b receptorantagonist), an HPK1 inhibitor, a chemokine receptor inhibitor (e.g.CCR2 or CCR5 inhibitor), a SHP1/2 phosphatase inhibitor, a histonedeacetylase inhibitor (HDAC) such as an HDAC8 inhibitor, an angiogenesisinhibitor, an interleukin receptor inhibitor, bromo and extra terminalfamily members inhibitors (for example, bromodomain inhibitors or BETinhibitors such as INCB54329 and INCB57643), an arginase inhibitor(INCB001158), a PARP inhibitor (such as rucaparib or olaparib),sitravatinib, a B-Raf inhibitor-MEK inhibitor combination (such asencorafenib plus binimetinib, dabrafenib plus trametinib, or cobimetinibplus vemurafenib), and an adenosine receptor antagonist or combinationsthereof.

In some embodiments, the compounds of the present disclosure can becombined with a TLR7 agonist (e.g., imiquimod).

The compounds of the present disclosure can further be used incombination with other methods of treating cancers, for example bychemotherapy, irradiation therapy, tumor-targeted therapy, adjuvanttherapy, immunotherapy or surgery. Examples of immunotherapy includecytokine treatment (e.g., interferons, GM-CSF, G-CSF, IL-2), CRS-207immunotherapy, cancer vaccine, monoclonal antibody, bispecific ormulti-specific antibody, antibody drug conjugate, adoptive T celltransfer, Toll receptor agonists, STING agonists, RIG-I agonists,oncolytic virotherapy and immunomodulating small molecules, includingthalidomide or JAK1/2 inhibitor, PI3Kδ inhibitor and the like. Thecompounds can be administered in combination with one or moreanti-cancer drugs, such as a chemotherapeutic agent. Examples ofchemotherapeutics include any of: abarelix, aldesleukin, alemtuzumab,alitretinoin, allopurinol, altretamine, anastrozole, arsenic trioxide,asparaginase, azacitidine, bevacizumab, bexarotene, baricitinib,bleomycin, bortezomib, busulfan intravenous, busulfan oral, calusterone,capecitabine, carboplatin, carmustine, cetuximab, chlorambucil,cisplatin, cladribine, clofarabine, cyclophosphamide, cytarabine,dacarbazine, dactinomycin, dalteparin sodium, dasatinib, daunorubicin,decitabine, denileukin, denileukin diftitox, dexrazoxane, docetaxel,doxorubicin, dromostanolone propionate, eculizumab, epirubicin,erlotinib, estramustine, etoposide phosphate, etoposide, exemestane,fentanyl citrate, filgrastim, floxuridine, fludarabine, fluorouracil,fulvestrant, gefitinib, gemcitabine, gemtuzumab ozogamicin, goserelinacetate, histrelin acetate, ibritumomab tiuxetan, idarubicin,ifosfamide, imatinib mesylate, interferon alfa 2a, irinotecan, lapatinibditosylate, lenalidomide, letrozole, leucovorin, leuprolide acetate,levamisole, lomustine, meclorethamine, megestrol acetate, melphalan,mercaptopurine, methotrexate, methoxsalen, mitomycin C, mitotane,mitoxantrone, nandrolone phenpropionate, nelarabine, nofetumomab,oxaliplatin, paclitaxel, pamidronate, panitumumab, pegaspargase,pegfilgrastim, pemetrexed disodium, pentostatin, pipobroman, plicamycin,procarbazine, quinacrine, rasburicase, rituximab, ruxolitinib,sorafenib, streptozocin, sunitinib, sunitinib maleate, tamoxifen,temozolomide, teniposide, testolactone, thalidomide, thioguanine,thiotepa, topotecan, toremifene, tositumomab, trastuzumab, tretinoin,uracil mustard, valrubicin, vinblastine, vincristine, vinorelbine,vorinostat and zoledronate.

Other anti-cancer agent(s) include antibody therapeutics such astrastuzumab (Herceptin), antibodies to costimulatory molecules such asCTLA-4 (e.g., ipilimumab), 4-1BB (e.g. urelumab, utomilumab), antibodiesto PD-1 and PD-L1, or antibodies to cytokines (IL-10, TGF-β, etc.).Examples of antibodies to PD-1 and/or PD-L1 that can be combined withcompounds of the present disclosure for the treatment of cancer orinfections such as viral, bacteria, fungus and parasite infectionsinclude, but are not limited to nivolumab, pembrolizumab, atezolizumab,durvalumab, avelumab and SHR-1210.

The compounds of the present disclosure can further be used incombination with one or more anti-inflammatory agents, steroids,immunosuppressants or therapeutic antibodies.

The compounds of Formula (I) or any of the formulas as described herein,a compound as recited in any of the claims and described herein, orsalts thereof can be combined with another immunogenic agent, such ascancerous cells, purified tumor antigens (including recombinantproteins, peptides, and carbohydrate molecules), cells, and cellstransfected with genes encoding immune stimulating cytokines.Non-limiting examples of tumor vaccines that can be used includepeptides of melanoma antigens, such as peptides of gp100, MAGE antigens,Trp-2, MARTI and/or tyrosinase, or tumor cells transfected to expressthe cytokine GM-CSF.

The compounds of Formula (I) or any of the formulas as described herein,a compound as recited in any of the claims and described herein, orsalts thereof can be used in combination with a vaccination protocol forthe treatment of cancer. In some embodiments, the tumor cells aretransduced to express GM-CSF. In some embodiments, tumor vaccinesinclude the proteins from viruses implicated in human cancers such asHuman Papilloma Viruses (HPV), Hepatitis Viruses (HBV and HCV) andKaposi's Herpes Sarcoma Virus (KHSV). In some embodiments, the compoundsof the present disclosure can be used in combination with tumor specificantigen such as heat shock proteins isolated from tumor tissue itself.In some embodiments, the compounds of Formula (I) or any of the formulasas described herein, a compound as recited in any of the claims anddescribed herein, or salts thereof can be combined with dendritic cellsimmunization to activate potent anti-tumor responses.

The compounds of the present disclosure can be used in combination withbispecific macrocyclic peptides that target Fe alpha or Fe gammareceptor-expressing effectors cells to tumor cells. The compounds of thepresent disclosure can also be combined with macrocyclic peptides thatactivate host immune responsiveness.

The compounds of the present disclosure can be used in combination withbone marrow transplant for the treatment of a variety of tumors ofhematopoietic origin.

The compounds of Formula (I) or any of the formulas as described herein,a compound as recited in any of the claims and described herein, orsalts thereof can be used in combination with vaccines, to stimulate theimmune response to pathogens, toxins, and self antigens. Examples ofpathogens for which this therapeutic approach may be particularlyuseful, include pathogens for which there is currently no effectivevaccine, or pathogens for which conventional vaccines are less thancompletely effective. These include, but are not limited to, HIV,Hepatitis (A, B, & C), Influenza, Herpes, Giardia, Malaria, Leishmania,Staphylococcus aureus, Pseudomonas Aeruginosa.

Viruses causing infections treatable by methods of the presentdisclosure include, but are not limit to human papillomavirus,influenza, hepatitis A, B, C or D viruses, adenovirus, poxvirus, herpessimplex viruses, human cytomegalovirus, severe acute respiratorysyndrome virus, ebola virus, measles virus, herpes virus (e.g., VZV,HSV-1, HAV-6, HSV-II, and CMV, Epstein Barr virus), flaviviruses,echovirus, rhinovirus, coxsackie virus, coronavirus, respiratorysyncytial virus, mumpsvirus, rotavirus, measles virus, rubella virus,parvovirus, vaccinia virus, HTLV virus, dengue virus, papillomavirus,molluscum virus, poliovirus, rabies virus, JC virus and arboviralencephalitis virus.

Pathogenic bacteria causing infections treatable by methods of thedisclosure include, but are not limited to, chlamydia, rickettsialbacteria, mycobacteria, staphylococci, streptococci, pneumococci,meningococci and conococci, klebsiella, proteus, serratia, pseudomonas,legionella, diphtheria, salmonella, bacilli, cholera, tetanus, botulism,anthrax, plague, leptospirosis, and Lyme's disease bacteria.

Pathogenic fungi causing infections treatable by methods of thedisclosure include, but are not limited to, Candida (albicans, krusei,glabrata, tropicalis, etc.), Cryptococcus neoformans, Aspergillus(fumigatus, niger, etc.), Genus Mucorales (mucor, absidia, rhizophus),Sporothrix schenkii, Blastomyces dermatitidis, Paracoccidioidesbrasiliensis, Coccidioides immitis and Histoplasma capsulatum.

Pathogenic parasites causing infections treatable by methods of thedisclosure include, but are not limited to, Entamoeba histolytica,Balantidium coli, Naegleriafowleri, Acanthamoeba sp., Giardia lambia,Cryptosporidium sp., Pneumocystis carinii, Plasmodium vivax, Babesiamicroti, Trypanosoma brucei, Trypanosoma cruzi, Leishmania donovani,Toxoplasma gondi, and Nippostrongylus brasiliensis.

When more than one pharmaceutical agent is administered to a patient,they can be administered simultaneously, separately, sequentially, or incombination (e.g., for more than two agents).

IV. Formulation, Dosage Forms and Administration

When employed as pharmaceuticals, the compounds of the presentdisclosure can be administered in the form of pharmaceuticalcompositions. Thus the present disclosure provides a compositioncomprising a compound of Formula (I) or any of the formulas as describedherein, a compound as recited in any of the claims and described herein,or a pharmaceutically acceptable salt thereof, or any of the embodimentsthereof, and at least one pharmaceutically acceptable carrier orexcipient. These compositions can be prepared in a manner well known inthe pharmaceutical art, and can be administered by a variety of routes,depending upon whether local or systemic treatment is indicated and uponthe area to be treated. Administration may be topical (includingtransdermal, epidermal, ophthalmic and to mucous membranes includingintranasal, vaginal and rectal delivery), pulmonary (e.g., by inhalationor insufflation of powders or aerosols, including by nebulizer;intratracheal or intranasal), oral or parenteral. Parenteraladministration includes intravenous, intraarterial, subcutaneous,intraperitoneal intramuscular or injection or infusion; or intracranial,e.g., intrathecal or intraventricular, administration. Parenteraladministration can be in the form of a single bolus dose, or may be,e.g., by a continuous perfusion pump. Pharmaceutical compositions andformulations for topical administration may include transdermal patches,ointments, lotions, creams, gels, drops, suppositories, sprays, liquidsand powders. Conventional pharmaceutical carriers, aqueous, powder oroily bases, thickeners and the like may be necessary or desirable.

This invention also includes pharmaceutical compositions which contain,as the active ingredient, the compound of the present disclosure or apharmaceutically acceptable salt thereof, in combination with one ormore pharmaceutically acceptable carriers or excipients. In someembodiments, the composition is suitable for topical administration. Inmaking the compositions of the invention, the active ingredient istypically mixed with an excipient, diluted by an excipient or enclosedwithin such a carrier in the form of, e.g., a capsule, sachet, paper, orother container. When the excipient serves as a diluent, it can be asolid, semi-solid, or liquid material, which acts as a vehicle, carrieror medium for the active ingredient. Thus, the compositions can be inthe form of tablets, pills, powders, lozenges, sachets, cachets,elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solidor in a liquid medium), ointments containing, e.g., up to 10% by weightof the active compound, soft and hard gelatin capsules, suppositories,sterile injectable solutions and sterile packaged powders.

In preparing a formulation, the active compound can be milled to providethe appropriate particle size prior to combining with the otheringredients. If the active compound is substantially insoluble, it canbe milled to a particle size of less than 200 mesh. If the activecompound is substantially water soluble, the particle size can beadjusted by milling to provide a substantially uniform distribution inthe formulation, e.g., about 40 mesh.

The compounds of the invention may be milled using known millingprocedures such as wet milling to obtain a particle size appropriate fortablet formation and for other formulation types. Finely divided(nanoparticulate) preparations of the compounds of the invention can beprepared by processes known in the art see, e.g., WO 2002/000196.

Some examples of suitable excipients include lactose, dextrose, sucrose,sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates,tragacanth, gelatin, calcium silicate, microcrystalline cellulose,polyvinylpyrrolidone, cellulose, water, syrup and methyl cellulose. Theformulations can additionally include: lubricating agents such as talc,magnesium stearate and mineral oil; wetting agents; emulsifying andsuspending agents; preserving agents such as methyl- andpropylhydroxy-benzoates; sweetening agents; and flavoring agents. Thecompositions of the invention can be formulated so as to provide quick,sustained or delayed release of the active ingredient afteradministration to the patient by employing procedures known in the art.

In some embodiments, the pharmaceutical composition comprises silicifiedmicrocrystalline cellulose (SMCC) and at least one compound describedherein, or a pharmaceutically acceptable salt thereof. In someembodiments, the silicified microcrystalline cellulose comprises about98% microcrystalline cellulose and about 2% silicon dioxide w/w.

In some embodiments, the composition is a sustained release compositioncomprising at least one compound described herein, or a pharmaceuticallyacceptable salt thereof, and at least one pharmaceutically acceptablecarrier or excipient. In some embodiments, the composition comprises atleast one compound described herein, or a pharmaceutically acceptablesalt thereof, and at least one component selected from microcrystallinecellulose, lactose monohydrate, hydroxypropyl methylcellulose andpolyethylene oxide. In some embodiments, the composition comprises atleast one compound described herein, or a pharmaceutically acceptablesalt thereof, and microcrystalline cellulose, lactose monohydrate andhydroxypropyl methylcellulose. In some embodiments, the compositioncomprises at least one compound described herein, or a pharmaceuticallyacceptable salt thereof, and microcrystalline cellulose, lactosemonohydrate and polyethylene oxide. In some embodiments, the compositionfurther comprises magnesium stearate or silicon dioxide. In someembodiments, the microcrystalline cellulose is Avicel PH102™. In someembodiments, the lactose monohydrate is Fast-flo 316™. In someembodiments, the hydroxypropyl methylcellulose is hydroxypropylmethylcellulose 2208 K4M (e.g., Methocel K4 M Premier™) and/orhydroxypropyl methylcellulose 2208 K100LV (e.g., Methocel K00LV™). Insome embodiments, the polyethylene oxide is polyethylene oxide WSR 1105(e.g., Polyox WSR 1105™).

In some embodiments, a wet granulation process is used to produce thecomposition. In some embodiments, a dry granulation process is used toproduce the composition.

The compositions can be formulated in a unit dosage form, each dosagecontaining from about 5 to about 1,000 mg (1 g), more usually about 100mg to about 500 mg, of the active ingredient. In some embodiments, eachdosage contains about 10 mg of the active ingredient. In someembodiments, each dosage contains about 50 mg of the active ingredient.In some embodiments, each dosage contains about 25 mg of the activeingredient. The term “unit dosage forms” refers to physically discreteunits suitable as unitary dosages for human subjects and other mammals,each unit containing a predetermined quantity of active materialcalculated to produce the desired therapeutic effect, in associationwith a suitable pharmaceutical excipient.

The components used to formulate the pharmaceutical compositions are ofhigh purity and are substantially free of potentially harmfulcontaminants (e.g., at least National Food grade, generally at leastanalytical grade, and more typically at least pharmaceutical grade).Particularly for human consumption, the composition is preferablymanufactured or formulated under Good Manufacturing Practice standardsas defined in the applicable regulations of the U.S. Food and DrugAdministration. For example, suitable formulations may be sterile and/orsubstantially isotonic and/or in full compliance with all GoodManufacturing Practice regulations of the U.S. Food and DrugAdministration.

The active compound may be effective over a wide dosage range and isgenerally administered in a therapeutically effective amount. It will beunderstood, however, that the amount of the compound actuallyadministered will usually be determined by a physician, according to therelevant circumstances, including the condition to be treated, thechosen route of administration, the actual compound administered, theage, weight, and response of the individual patient, the severity of thepatient's symptoms and the like.

The therapeutic dosage of a compound of the present invention can varyaccording to, e.g., the particular use for which the treatment is made,the manner of administration of the compound, the health and conditionof the patient, and the judgment of the prescribing physician. Theproportion or concentration of a compound of the invention in apharmaceutical composition can vary depending upon a number of factorsincluding dosage, chemical characteristics (e.g., hydrophobicity), andthe route of administration. For example, the compounds of the inventioncan be provided in an aqueous physiological buffer solution containingabout 0.1 to about 10% w/v of the compound for parenteraladministration. Some typical dose ranges are from about 1 μg/kg to about1 g/kg of body weight per day. In some embodiments, the dose range isfrom about 0.01 mg/kg to about 100 mg/kg of body weight per day. Thedosage is likely to depend on such variables as the type and extent ofprogression of the disease or disorder, the overall health status of theparticular patient, the relative biological efficacy of the compoundselected, formulation of the excipient, and its route of administration.Effective doses can be extrapolated from dose-response curves derivedfrom in vitro or animal model test systems.

For preparing solid compositions such as tablets, the principal activeingredient is mixed with a pharmaceutical excipient to form a solidpreformulation composition containing a homogeneous mixture of acompound of the present invention. When referring to thesepreformulation compositions as homogeneous, the active ingredient istypically dispersed evenly throughout the composition so that thecomposition can be readily subdivided into equally effective unit dosageforms such as tablets, pills and capsules. This solid preformulation isthen subdivided into unit dosage forms of the type described abovecontaining from, e.g., about 0.1 to about 1000 mg of the activeingredient of the present invention.

The tablets or pills of the present invention can be coated or otherwisecompounded to provide a dosage form affording the advantage of prolongedaction. For example, the tablet or pill can comprise an inner dosage andan outer dosage component, the latter being in the form of an envelopeover the former. The two components can be separated by an enteric layerwhich serves to resist disintegration in the stomach and permit theinner component to pass intact into the duodenum or to be delayed inrelease. A variety of materials can be used for such enteric layers orcoatings, such materials including a number of polymeric acids andmixtures of polymeric acids with such materials as shellac, cetylalcohol and cellulose acetate.

The liquid forms in which the compounds and compositions of the presentinvention can be incorporated for administration orally or by injectioninclude aqueous solutions, suitably flavored syrups, aqueous or oilsuspensions, and flavored emulsions with edible oils such as cottonseedoil, sesame oil, coconut oil, or peanut oil, as well as elixirs andsimilar pharmaceutical vehicles.

Compositions for inhalation or insufflation include solutions andsuspensions in pharmaceutically acceptable, aqueous or organic solvents,or mixtures thereof, and powders. The liquid or solid compositions maycontain suitable pharmaceutically acceptable excipients as describedsupra. In some embodiments, the compositions are administered by theoral or nasal respiratory route for local or systemic effect.Compositions can be nebulized by use of inert gases. Nebulized solutionsmay be breathed directly from the nebulizing device or the nebulizingdevice can be attached to a face mask, tent, or intermittent positivepressure breathing machine. Solution, suspension, or powder compositionscan be administered orally or nasally from devices which deliver theformulation in an appropriate manner.

Topical formulations can contain one or more conventional carriers. Insome embodiments, ointments can contain water and one or morehydrophobic carriers selected from, e.g., liquid paraffin,polyoxyethylene alkyl ether, propylene glycol, white Vaseline, and thelike. Carrier compositions of creams can be based on water incombination with glycerol and one or more other components, e.g.,glycerinemonostearate, PEG-glycerinemonostearate and cetylstearylalcohol. Gels can be formulated using isopropyl alcohol and water,suitably in combination with other components such as, e.g., glycerol,hydroxyethyl cellulose, and the like. In some embodiments, topicalformulations contain at least about 0.1, at least about 0.25, at leastabout 0.5, at least about 1, at least about 2 or at least about 5 wt %of the compound of the invention. The topical formulations can besuitably packaged in tubes of, e.g., 100 g which are optionallyassociated with instructions for the treatment of the select indication,e.g., psoriasis or other skin condition.

The amount of compound or composition administered to a patient willvary depending upon what is being administered, the purpose of theadministration, such as prophylaxis or therapy, the state of thepatient, the manner of administration and the like. In therapeuticapplications, compositions can be administered to a patient alreadysuffering from a disease in an amount sufficient to cure or at leastpartially arrest the symptoms of the disease and its complications.Effective doses will depend on the disease condition being treated aswell as by the judgment of the attending clinician depending uponfactors such as the severity of the disease, the age, weight and generalcondition of the patient and the like.

The compositions administered to a patient can be in the form ofpharmaceutical compositions described above. These compositions can besterilized by conventional sterilization techniques, or may be sterilefiltered. Aqueous solutions can be packaged for use as is, orlyophilized, the lyophilized preparation being combined with a sterileaqueous carrier prior to administration. The pH of the compoundpreparations typically will be between 3 and 11, more preferably from 5to 9 and most preferably from 7 to 8. It will be understood that use ofcertain of the foregoing excipients, carriers or stabilizers will resultin the formation of pharmaceutical salts.

The therapeutic dosage of a compound of the present invention can varyaccording to, e.g., the particular use for which the treatment is made,the manner of administration of the compound, the health and conditionof the patient, and the judgment of the prescribing physician. Theproportion or concentration of a compound of the invention in apharmaceutical composition can vary depending upon a number of factorsincluding dosage, chemical characteristics (e.g., hydrophobicity), andthe route of administration. For example, the compounds of the inventioncan be provided in an aqueous physiological buffer solution containingabout 0.1 to about 10% w/v of the compound for parenteraladministration. Some typical dose ranges are from about 1 μg/kg to about1 g/kg of body weight per day. In some embodiments, the dose range isfrom about 0.01 mg/kg to about 100 mg/kg of body weight per day. Thedosage is likely to depend on such variables as the type and extent ofprogression of the disease or disorder, the overall health status of theparticular patient, the relative biological efficacy of the compoundselected, formulation of the excipient, and its route of administration.Effective doses can be extrapolated from dose-response curves derivedfrom in vitro or animal model test systems.

V. Labeled Compounds and Assay Methods

The compounds of the present disclosure can further be useful ininvestigations of biological processes in normal and abnormal tissues.Thus, another aspect of the present invention relates to labeledcompounds of the invention (radio-labeled, fluorescent-labeled, etc.)that would be useful not only in imaging techniques but also in assays,both in vitro and in vivo, for localizing and quantitating PD-1 or PD-L1protein in tissue samples, including human, and for identifying PD-L1ligands by inhibition binding of a labeled compound. Accordingly, thepresent invention includes PD-1/PD-L1 binding assays that contain suchlabeled compounds.

The present invention further includes isotopically-labeled compounds ofthe disclosure. An “isotopically” or “radio-labeled” compound is acompound of the invention where one or more atoms are replaced orsubstituted by an atom having an atomic mass or mass number differentfrom the atomic mass or mass number typically found in nature (i.e.,naturally occurring). Suitable radionuclides that may be incorporated incompounds of the present invention include but are not limited to ³H(also written as T for tritium), C, ¹³C, ¹⁴C, ¹³N, ¹⁵N, ¹⁵O, ¹⁷O, ¹⁸O,¹⁸F, ³⁵S, ³⁶Cl, ⁸²Br, ⁷⁵Br, ⁷⁶Br, ⁷⁷Br, ¹²³I, ¹²⁴I, ¹²⁵I and ¹³¹I. Forexample, one or more hydrogen atoms in a compound of the presentdisclosure can be replaced by deuterium atoms (e.g., one or morehydrogen atoms of a C₁₋₆ alkyl group of Formula (I) can be optionallysubstituted with deuterium atoms, such as —CD₃ being substituted for—CH₃). In some embodiments, alkyl groups in Formula (I) can beperdeuterated.

One or more constituent atoms of the compounds presented herein can bereplaced or substituted with isotopes of the atoms in natural ornon-natural abundance. In some embodiments, the compound includes atleast one deuterium atom. In some embodiments, the compound includes twoor more deuterium atoms. In some embodiments, the compound includes 1-2,1-3, 1-4, 1-5, or 1-6 deuterium atoms. In some embodiments, all of thehydrogen atoms in a compound can be replaced or substituted by deuteriumatoms.

Synthetic methods for including isotopes into organic compounds areknown in the art (Deuterium Labeling in Organic Chemistry by Alan F.Thomas (New York, N.Y., Appleton-Century-Crofts, 1971; The Renaissanceof H/D Exchange by Jens Atzrodt, Volker Derdau, Thorsten Fey and JochenZimmermann, Angew. Chem. Int. Ed. 2007, 7744-7765; The Organic Chemistryof Isotopic Labelling by James R. Hanson, Royal Society of Chemistry,2011). Isotopically labeled compounds can be used in various studiessuch as NMR spectroscopy, metabolism experiments, and/or assays.

Substitution with heavier isotopes, such as deuterium, may affordcertain therapeutic advantages resulting from greater metabolicstability, for example, increased in vivo half-life or reduced dosagerequirements, and hence may be preferred in some circumstances. (seee.g., A. Kerekes et. al. J. Med. Chem. 2011, 54, 201-210; R. Xu et. al.J. Label Compd. Radiopharm. 2015, 58, 308-312). In particular,substitution at one or more metabolism sites may afford one or more ofthe therapeutic advantages.

The radionuclide that is incorporated in the instant radio-labeledcompounds will depend on the specific application of that radio-labeledcompound. For example, for in vitro PD-L1 protein labeling andcompetition assays, compounds that incorporate ³H, ¹⁴C, ⁸²Br, ¹²⁵I,¹³¹I, ³⁵S or will generally be most useful. For radio-imagingapplications ¹¹C, ¹⁸F, ¹²⁵I, ¹²³I, ¹²⁴I, ¹³¹I, ⁷⁵Br, ⁷⁶Br or ⁷⁷Br can beuseful.

It is understood that a “radio-labeled” or “labeled compound” is acompound that has incorporated at least one radionuclide. In someembodiments, the radionuclide is selected from the group consisting of³H, ¹⁴C, ¹²⁵I, ³⁵S and ⁸²Br.

The present disclosure can further include synthetic methods forincorporating radio-isotopes into compounds of the disclosure. Syntheticmethods for incorporating radio-isotopes into organic compounds are wellknown in the art, and an ordinary skill in the art will readilyrecognize the methods applicable for the compounds of disclosure.

A labeled compound of the invention can be used in a screening assay toidentify and/or evaluate compounds. For example, a newly synthesized oridentified compound (i.e., test compound) which is labeled can beevaluated for its ability to bind a PD-L1 protein by monitoring itsconcentration variation when contacting with the PD-L1 protein, throughtracking of the labeling. For example, a test compound (labeled) can beevaluated for its ability to reduce binding of another compound which isknown to bind to a PD-L1 protein (i.e., standard compound). Accordingly,the ability of a test compound to compete with the standard compound forbinding to the PD-L1 protein directly correlates to its bindingaffinity. Conversely, in some other screening assays, the standardcompound is labeled and test compounds are unlabeled. Accordingly, theconcentration of the labeled standard compound is monitored in order toevaluate the competition between the standard compound and the testcompound, and the relative binding affinity of the test compound is thusascertained.

VI. Kits

The present disclosure also includes pharmaceutical kits useful, e.g.,in the treatment or prevention of diseases or disorders associated withthe activity of PD-L1 including its interaction with other proteins suchas PD-1 and B7-1 (CD80), such as cancer or infections, which include oneor more containers containing a pharmaceutical composition comprising atherapeutically effective amount of a compound of Formula (I), or any ofthe embodiments thereof. Such kits can further include one or more ofvarious conventional pharmaceutical kit components, such as, e.g.,containers with one or more pharmaceutically acceptable carriers,additional containers, etc., as will be readily apparent to thoseskilled in the art. Instructions, either as inserts or as labels,indicating quantities of the components to be administered, guidelinesfor administration, and/or guidelines for mixing the components, canalso be included in the kit.

The following abbreviations may be used herein: aq. (aqueous); br(broad); d (doublet); dd (doublet of doublets); DCM (dichloromethane);DMF (N, N-dimethylformamide); Et (ethyl); EtOAc (ethyl acetate); g(gram(s)); h (hour(s)); HPLC (high performance liquid chromatography);Hz (hertz); J (coupling constant); LCMS (liquid chromatography-massspectrometry); m (multiplet); M (molar); MS (Mass spectrometry); Me(methyl); MeCN (acetonitrile); MeOH (methanol); mg (milligram(s)); min.(minutes(s)); mL (milliliter(s)); mmol (millimole(s)); nM (nanomolar);NMR (nuclear magnetic resonance spectroscopy); Ph (phenyl); r.t. (roomtemperature), s (singlet); t (triplet or tertiary); TBS(tert-butyldimethylsilyl); tert (tertiary); tt (triplet of triplets);TFA (trifluoroacetic acid); THF (tetrahydrofuran); g (microgram(s)); μL(microliter(s)); μM (micromolar); wt % (weight percent).

The invention will be described in greater detail by way of specificexamples. The following examples are offered for illustrative purposes,and are not intended to limit the invention in any manner. Those ofskill in the art will readily recognize a variety of non-criticalparameters which can be changed or modified to yield essentially thesame results. The compounds of the Examples have been found to inhibitthe activity of PD-1/PD-L1 protein/protein interaction according to atleast one assay described herein.

EXAMPLES

Experimental procedures for compounds of the invention are providedbelow. Open Access Preparative LCMS Purification of some of thecompounds prepared was performed on Waters mass directed fractionationsystems. The basic equipment setup, protocols and control software forthe operation of these systems have been described in detail inliterature. See, e.g., Blom, “Two-Pump At Column Dilution Configurationfor Preparative LC-MS”, K. Blom, J. Combi. Chem., 2002, 4, 295-301; Blomet al., “Optimizing Preparative LC-MS Configurations and Methods forParallel Synthesis Purification”, J. Combi. Chem., 2003, 5, 670-83; andBlom et al., “Preparative LC-MS Purification: Improved Compound SpecificMethod Optimization”, J. Combi. Chem., 2004, 6, 874-883.

Example 14-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: tert-butyl1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A solution of 1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine(Accela, cat #SY032476: 2.0 g, 14.58 mmol) and (Boc)₂O (3.38 mL, 14.58mmol) in dichloromethane (60 mL) was stirred at room temperature for 1h. The reaction was quenched with saturated aqueous NaHCO₃ solution, andextracted with ethyl acetate. The combined organic layers were washedwith brine, dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The crude product was used directly in the next step withoutfurther purification. LC-MS calculated for C₁₂H₂₀N₃O₂ (M+H)⁺: m/z=238.2;found 238.2.

Step 2: 5-tert-butyl 2-methyl1-methyl-6,7-dihydro-1H-imidazo[4,5-c]pyridine-2,5(4H)-dicarboxylate

n-Butyllithium in hexanes (2.5 M, 7.00 mL, 17.49 mmol) was added to acold (−78° C.) solution of tert-butyl1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 1: 3.46 g, 14.58 mmol) in tetrahydrofuran (60.0 mL). The reactionmixture was stirred at −78° C. for 10 min prior to the addition ofmethyl chloroformate (1.69 mL, 21.87 mmol). After being stirred at −78°C. for 30 min, the reaction was then quenched with saturated aqueousNaHCO₃ solution, and extracted with ethyl acetate. The combined organiclayers were washed with brine, dried over Na₂SO₄, filtered, andconcentrated under reduced pressure. The residue was purified by flashchromatography on a silica gel column eluting with 0-80% ethyl acetatein hexanes to afford the desired product. LC-MS calculated forC₁₄H₂₂N₃O₄ (M+H)⁺: m/z=296.2; found 296.3.

Step 3: tert-butyl2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

Potassium tert-butoxide in THF (1.0 M, 3.39 mL, 3.39 mmol) was added toa solution of 5-tert-butyl 2-methyl1-methyl-6,7-dihydro-1H-imidazo[4,5-c]pyridine-2,5(4H)-dicarboxylate(Step 2: 500 mg, 1.69 mmol) and 3-bromo-2-chloroaniline (350 mg, 1.69mmol) in tetrahydrofuran (12.0 mL). After being stirred at roomtemperature for 30 min, the reaction mixture was quenched with water,and extracted with ethyl acetate. The combined organic layers werewashed with brine, dried over Na₂SO₄, filtered, and concentrated underreduced pressure. The residue was purified by flash chromatography on asilica gel column eluting with 0-50% ethyl acetate in hexanes to affordthe desired product. LC-MS calculated for C₁₉H₂₃BrClN₄O₃ (M+H)⁺:m/z=469.1/471.1; found 469.1/471.1.

Step 4: tert-butyl2-((2-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A mixture of tert-butyl2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 3: 1.0 g, 2.129 mmol),4,4,5,5,4′,4′,5′,5′-octamethyl-[2,2′]bi[[1,3,2]dioxaborolanyl] (0.649 g,2.55 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II)complexed with dichloromethane (1:1) (0.174 g, 0.213 mmol) and potassiumacetate (0.522 g, 5.32 mmol) in 1,4-dioxane (24.0 mL) was purged withnitrogen and then stirred at 110° C. for 3 h. The reaction mixture wascooled to room temperature, diluted with dichloromethane, and thenfiltered through Celite. The filtrate was concentrated under reducedpressure, and the residue was purified by flash chromatography on asilica gel column eluting with 0-30% ethyl acetate in hexanes to affordthe desired product. LC-MS calculated for C₂₅H₃₅BClN₄O₅ (M+H)⁺:m/z=517.2; found 517.2.

Step 5: tert-butyl2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A mixture of tert-butyl2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 3: 900 mg, 1.92 mmol) in trifluoroacetic acid (4.0 mL) anddichloromethane (8.0 mL) was stirred at room temperature for 1 h. Thereaction mixture was concentrated under reduced pressure. A mixture ofthe above residue, tert-butyl2-((2-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 4: 1188 mg, 2.30 mmol), sodium carbonate (1015 mg, 9.58 mmol) and[1,1-bis(di-cyclohexylphosphino)ferrocene]dichloropalladium(II) (145 mg,0.19 mmol) in 1,4-dioxane (12.0 mL) and water (6.0 mL) was purged withnitrogen and then stirred at 110° C. for 2 h. After being cooled to roomtemperature, the reaction mixture was diluted with water and extractedwith dichloromethane. The combined organic layers were dried overNa₂SO₄, filtered, and concentrated under reduced pressure. The residuewas purified by flash chromatography on a silica gel column eluting with0-10% methanol in dichloromethane to afford the desired product. LC-MScalculated for C₃₃H₃₇Cl₂N₈O₄ (M+H)⁺: m/z=679.2; found 679.2.

Step 6: methyl 4-formylbicyclo[2.2.1]heptane-1-carboxylate

A mixture of methyl 4-(hydroxymethyl)bicyclo[2.2.1]heptane-1-carboxylate(PharmaBlock, cat#PBZ3820: 400 mg, 2.17 mmol) and Dess-Martinperiodinane (1381 mg, 3.26 mmol) in dichloromethane (12.0 mL) wasstirred at room temperature for 2 h. The reaction mixture was quenchedwith 20% aqueous Na₂S₂O₃ solution and saturated aqueous NaHCO₃ solution,and extracted with ethyl acetate. The combined organic layers werewashed with brine, dried over Na₂SO₄, filtered, and concentrated underreduced pressure. The crude product was used directly in the next stepwithout further purification.

Step 7: methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate

Potassium tert-butoxide in THF (1.0 M, 4.39 mL, 4.39 mmol) was added toa suspension of chloro(methoxymethyl)triphenylphosphorane (1505 mg, 4.39mmol) in tetrahydrofuran (12.0 mL). The reaction mixture was stirred atroom temperature for 1 h prior to the addition of methyl4-formylbicyclo[2.2.1]heptane-1-carboxylate (Step 6: 400 mg, 2.195mmol). After being stirred at room temperature for 5 h, the reactionmixture was quenched with water, and extracted with ethyl acetate. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered, and concentrated under reduced pressure. The residue wasdissolved in tetrahydrofuran (12.0 mL), and then treated with HCl inwater (4.0 M, 11 mL, 43.9 mmol) at room temperature for 1 h. Thereaction mixture was diluted with water and extracted with ethylacetate. The combined organic layers were washed with brine, dried overNa₂SO₄, filtered, and concentrated under reduced pressure. The crudeproduct was used directly in the next step without further purification.

Step 8: methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Step 7: 43.3mg, 0.221 mmol) was added to a mixture of tert-butyl2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 5: 100 mg, 0.147 mmol) and sodium triacetoxyborohydride (94 mg,0.441 mmol) in dichloromethane (1.5 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wastreated with dichloromethane (1.0 mL) and trifluoroacetic acid (0.5 mL)at room temperature for 1 h. The reaction mixture was concentrated underreduced pressure. The residue was treated with saturated aqueous NaHCO₃solution, and extracted with dichloromethane. The combined organiclayers were dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₃₉H₄₅C₁₂N₈O₄ (M+H)⁺: m/z=759.3;found 759.3.

Step 9:4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Lithium hydroxide, monohydrate (11.1 mg, 0.263 mmol) was added to asolution of methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 8: 40 mg, 0.053 mmol) in THF/MeOH/water (0.2 mL/0.2 mL/0.1 mL).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith MeOH, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₃₈H₄₃Cl₂N₈O₄ (M+H)⁺: m/z=745.3; found 745.3. ¹H NMR (600 MHz, DMSO-d6)δ 9.93 (s, 2H), 9.49 (s, 1H), 8.29 (dd, J=8.2, 1.3 Hz, 1H), 8.28 (dd,J=8.2, 1.3 Hz, 1H), 7.51 (t, J=8.0 Hz, 2H), 7.18 (d, J=7.5, 2H),4.55-4.44 (m, 1H), 4.28-4.15 (m, 3H), 3.95 (s, 3H), 3.95 (s, 3H),3.87-3.78 (m, 1H), 3.54-3.38 (m, 3H), 3.32-3.20 (m, 2H), 3.18-2.92 (m,4H), 2.04-1.82 (m, 4H), 1.58-1.48 (m, 4H), 1.45 (s, 2H), 1.42-1.32 (m,2H).

Example 24-(2-(2-((2,2′-dichloro-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Tetrahydro-4H-pyran-4-one (2.6 mg, 0.026 mmol) was added to a mixture ofmethyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 10 mg, 0.013 mmol), and sodium triacetoxyborohydride(8.4 mg, 0.039 mmol) in dichloromethane (0.20 mL). After being stirredat room temperature for 2 h, the reaction mixture was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wasdissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and treated withlithium hydroxide, monohydrate (2.8 mg, 0.066 mmol). After being stirredat 30° C. for 3 h, the reaction mixture was diluted with methanol, andpurified by prep-HPLC (pH=2, acetonitrile/water+TFA) to give the desiredproduct as the TFA salt. LC-MS calculated for C₄₃H₅₁Cl₂N₈O₅ (M+H)⁺:m/z=829.3; found 829.4. ¹H NMR (500 MHz, DMSO-d6) δ 9.93 (s, 1H), 9.92(s, 1H), 8.31 (dd, J=8.4, 1.4 Hz, 1H), 8.29 (dd, J=8.4, 1.4 Hz, 1H),7.51 (t, J=7.7 Hz, 2H), 7.18 (d, J=7.6, 1H), 7.18 (d, J=7.6, 1H),4.56-4.18 (m, 4H), 4.04-3.97 (m, 2H), 3.96 (s, 3H), 3.95 (s, 3H),3.95-3.78 (m, 2H), 3.68-3.56 (m, 1H), 3.50-3.20 (m, 6H), 3.15-2.94 (m,4H), 2.13-1.70 (m, 8H), 1.59-1.48 (m, 4H), 1.46 (s, 2H), 1.42-1.32 (m,2H).

TABLE 1 The compounds in Table 1 were prepared in accordance with thesynthetic protocols set forth in Example 2 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺  34-(2-(2-((2,2′-dichloro-3′- (1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5- c]pyridine-2-carboxamido)- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

759.3  4 4-(2-(2-((2,2′-dichloro-3′-(5- ethyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5- c]pyridine-2-carboxamido)- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

773.3  5 4-(2-(2-((2,2′-dichloro-3′-(5- isopropyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5- c]pyridine-2-carboxamido)- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

787.3  6 4-(2-(2-((2,2′-dichloro-3′-(5- cyclobutyl-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)- 1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin- 5- yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic acid

799.3  7 4-(2-(2-((3′-(5-(1- carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′- dichloro-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

871.4  8 4-(2-(2-((2,2′-dichloro-3′-(1- methyl-5-(1-sulfamoylpiperidin-4-yl)- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin- 5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

907.4  9 4-(2-(2-((3′-(5-((1H- pyrazol-3-yl)methyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′- dichloro-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

825.3 10 4-(2-(2-((2,2′-dichloro-3′-(5- (1,3-dihydroxypropan-2-yl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin- 5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

819.3 11 (R)-4-(2-(2-((2,2′-dichloro- 3′-(5-(2,3-dihydroxypropyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin- 5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

819.3 12 (S)-4-(2-(2-((2,2′-dichloro- 3′-(5-(2,3-dihydroxypropyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin- 5-yl)ethyl)bicyclo[2.2.1]heptane- 1-carboxylic acid

819.3

Example 13(R)-4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

(R)-2-((Tert-butyldimethylsilyl)oxy)propanal (5.0 mg, 0.026 mmol) wasadded to a mixture of methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 10 mg, 0.013 mmol), and sodium triacetoxyborohydride(8.4 mg, 0.039 mmol) in dichloromethane (0.20 mL). After being stirredat room temperature for 2 h, the reaction mixture was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wasdissolved in methanol (0.10 mL), and then treated with HCl in1,4-dioxane (4.0 M, 65.8 μL, 0.263 mmol) at 40° C. for 2 h. The reactionmixture was concentrated under reduced pressure. The residue wasdissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and then treatedwith lithium hydroxide, monohydrate (5.5 mg, 0.132 mmol). After beingstirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₁H₄₉Cl₂N₈O₅ (M+H)⁺: m/z=803.3; found 803.3. ¹H NMR (600 MHz, DMSO-d6)δ 9.93 (s, 2H), 8.32-8.25 (m, 2H), 7.51 (t, J=7.9 Hz, 2H), 7.18 (d,J=7.6, 2H), 5.53 (br, 1H), 4.55-4.12 (m, 5H), 3.95 (s, 3H), 3.95 (s,3H), 3.87-2.92 (m, 12H), 2.04-1.82 (m, 4H), 1.58-1.47 (m, 4H), 1.46 (s,2H), 1.42-1.32 (m, 2H), 1.13 (d, J=6.1 Hz, 3H).

TABLE 2 The compounds in Table 2 were prepared in accordance with thesynthetic protocols set forth in Example 13 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 14(S)-4-(2-(2-((2,2′-dichloro- 3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

803.3 15 4-(2-(2-((2,2′-dichloro-3′-(5- (2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)- 1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin- 5-yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

789.3 16 4-(2-(2-((2,2′-dichloro-3′-(5- (3-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.l]- heptane-1-carboxylic acid

803.3

Example 174,4′-(((((2,2′-dichloro-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid)

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 5.2 mg, 0.026 mmol) was added to a mixture of methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 10 mg, 0.013 mmol), and sodium triacetoxyborohydride(8.37 mg, 0.039 mmol) in dichloromethane (0.20 mL). After being stirredat room temperature for 2 h, the reaction mixture was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wasdissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and treated withlithium hydroxide, monohydrate (5.5 mg, 0.132 mmol). After being stirredat 30° C. for 3 h, the reaction mixture was diluted with methanol, andpurified by prep-HPLC (pH=2, acetonitrile/water+TFA) to give the desiredproduct as the TFA salt. LC-MS calculated for C₄₈H₅₇Cl₂N₈O₆ (M+H)⁺:m/z=911.4; found 911.4. ¹H NMR (600 MHz, DMSO-d6) δ 12.08 (s, 2H), 9.93(s, 2H), 8.29 (d, J=8.1 Hz, 2H), 7.51 (t, J=7.9 Hz, 2H), 7.18 (d, J=7.7Hz, 2H), 4.56-4.44 (m, 2H), 4.30-4.18 (m, 2H), 3.95 (s, 6H), 3.87-3.78(m, 2H), 3.52-3.20 (m, 6H), 3.14-2.94 (m, 4H), 2.04-1.82 (m, 8H),1.58-1.48 (m, 8H), 1.46 (s, 4H), 1.42-1.32 (m, 4H).

TABLE 3 The compounds in Table 3 were prepared in accordance with thesynthetic protocols set forth in Example 17 using the appropriatestarting materials. Example LC-MS # Name/¹H NMR Structure (M + H)⁺ 184-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]- heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′- dichloro-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]- heptane-1-carboxylic acid ¹H NMR (500 MHz,DMSO-d₆) δ 9.93 (s, 1H), 9.92(s, 1H), 8.30 (dd, J = 8.3, 1.6 Hz, 1H),8.29 (dd, J =

897.4 8.3, 1.6 Hz, 1H), 7.51 (t, J = 7.9 Hz, 2H), 7.18 (dd, J = 7.6, 1.6Hz, 2H), 4.58-4.45 (m, 2H), 4.36-4.18 (m, 2H), 3.96 (s, 3H), 3.96 (s,3H), 3.88-3.72 (m, 2H), 3.60-3.38 (m, 4H), 3.34- 3.22 (m, 2H), 3.14-2.95(m, 4H), 2.05-1.83 (m, 6H), 1.80-1.72 (m, 2H), 1.67 (s, 2H), 1.63-1.48(m, 8H), 1.46 (s, 2H), 1.42- 1.32 (m, 2H). 19 4-(2-(2-((3′-(5-(carboxymethyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

803.3 20 4-(2-(2-((3′-(5-(3- carboxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

831.3 21 4-(2-(2-((3′-(5-(2-carboxy- 2-methylpropyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

845.3 22 4-(2-(2-((3′-(5-((1- carboxycyclopropyl)methyl)-1-methyl-4,5,6,7- tetrahydro-1H-imidazo[4,5- c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

843.3 23 4-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]-heptan-1-yl)ethyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.2]- octane-1-carboxylic acid

911.4 24 3-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]-heptan-1-yl)ethyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[1.1.1]- pentane-1-carboxylic acid

869.4 25 4-(2-(2-((3′-(5-(4- carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′- dichloro-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

893.4 26 5-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]-heptan-1-yl)ethyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dichloro- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)-1H-pyrazole-3- carboxylic acid

869.3

Example 274-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: tert-butyl2-((3-bromo-2-methylphenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

Potassium tert-butoxide in THF (1.0 M, 13.54 mL, 13.54 mmol) was addedto a solution of 5-tert-butyl 2-methyl1-methyl-6,7-dihydro-1H-imidazo[4,5-c]pyridine-2,5(4H)-dicarboxylate(Example 1, Step 2: 2.00 g, 6.77 mmol) and 3-bromo-2-methylaniline (1.26g, 6.77 mmol) in tetrahydrofuran (34.0 mL). After being stirred at roomtemperature for 30 min, the reaction mixture was quenched with water,and extracted with ethyl acetate. The combined organic layers werewashed with brine, dried over Na₂SO₄, filtered, and concentrated underreduced pressure. The residue was purified by flash chromatography on asilica gel column eluting with 0-50% ethyl acetate in hexanes to affordthe desired product. LC-MS calculated for C₂₀H₂₆BrN₄O₃ (M+H)⁺:m/z=449.1/451.1; found 449.1/451.1.

Step 2: tert-butyl1-methyl-2-((2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A mixture of tert-butyl2-((3-bromo-2-methylphenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 1: 600 mg, 1.34 mmol),4,4,5,5,4′,4′,5′,5′-octamethyl-[2,2′]bi[[1,3,2]dioxaborolanyl] (509 mg,2.00 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II)complexed with dichloromethane (1:1) (109 mg, 0.14 mmol) and potassiumacetate (393 mg, 4.01 mmol) in 1,4-dioxane (13.0 mL) was purged withnitrogen and then stirred at 100° C. for 2 h. The reaction mixture wascooled to room temperature, diluted with dichloromethane, and thenfiltered through Celite. The filtrate was concentrated, and the residuewas purified by flash chromatography on a silica gel column eluting with0-30% ethyl acetate in hexanes to afford the desired product. LC-MScalculated for C₂₆H₃₈BN₄O₅ (M+H)⁺: m/z=497.3; found 497.3.

Step 3: tert-butyl2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A solution of tert-butyl2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 1, Step 3: 1.0 g, 2.129 mmol) in dichloromethane (8.0 mL) andtrifluoroacetic acid (4.0 mL) was stirred at room temperature for 1 h.The reaction mixture was concentrated under reduced pressure. A mixtureof the above residue, tert-butyl1-methyl-2-((2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 2: 1.162 g, 2.342 mmol), sodium carbonate (1.128 g, 10.64 mmol)and [1,1-bis(di-cyclohexylphosphino)ferrocene]dichloropalladium(II)(0.161 g, 0.213 mmol) in 1,4-dioxane (12.0 mL) and water (6.0 mL) waspurged with nitrogen and then stirred at 110° C. for 2 h. After beingcooled to room temperature, the reaction mixture was diluted with waterand extracted with dichloromethane. The combined organic layers weredried over Na₂SO₄, filtered, and concentrated under reduced pressure.The residue was purified by flash chromatography on a silica gel columneluting with 0-10% methanol in dichloromethane to afford the desiredproduct. LC-MS calculated for C₃₄H₄₀ClN₈O₄ (M+H)⁺: m/z=659.3; found659.4.

Step 4: methyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 44.7 mg, 0.228 mmol) was added to a mixture of tert-butyl2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 3: 100 mg, 0.152 mmol) and sodium triacetoxyborohydride (96 mg,0.455 mmol) in dichloromethane (1.5 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wastreated with dichloromethane (1.0 mL) and trifluoroacetic acid (0.5 mL)at room temperature for 1 h. The mixture was concentrated under reducedpressure. The residue was treated with saturated aqueous NaHCO₃solution, and extracted with dichloromethane. The combined organiclayers were dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₄₀H₄₈ClN₈O₄ (M+H)⁺: m/z=739.3;found 739.3.

Step 5:4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Lithium hydroxide, monohydrate (2.8 mg, 0.068 mmol) was added to asolution of methyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 4: 10 mg, 0.014 mmol) in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith MeOH, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₃₉H₄₆ClN₈O₄ (M+H)⁺: m/z=725.3; found 725.3.

Example 284-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Tetrahydro-4H-pyran-4-one (2.7 mg, 0.027 mmol) was added to a mixture ofmethyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 27, Step 4: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andtreated with lithium hydroxide, monohydrate (2.8 mg, 0.068 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₄H₅₄ClN₈O₅ (M+H)⁺: m/z=809.4; found 809.4.

TABLE 4 The compounds in Table 4 were prepared in accordance with thesynthetic protocols set forth in Example 28 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 294-(2-(2-((2-chloro-3′-(1,5- dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine- 2-carboxamido)-2′-methyl- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

739.3 30 4-(2-(2-((3′-(5-(1- carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′- methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

851.4

Example 31(R)-4-(2-(2-((2-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

(R)-2-((Tert-butyldimethylsilyl)oxy)propanal (5.1 mg, 0.027 mmol) wasadded to a mixture of methyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 27, Step 4: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in methanol (0.10 mL), and then treated with HClin 1,4-dioxane (4.0 M, 67.6 μL, 0.271 mmol) at 40° C. for 2 h. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and thentreated with lithium hydroxide, monohydrate (5.7 mg, 0.135 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₂H₅₂ClN₈O₅ (M+H)⁺: m/z=783.4; found 783.4. ¹H NMR (600 MHz, DMSO-d₆) δ9.94 (s, 1H), 9.91 (s, 1H), 8.25 (d, J=8.1 Hz, 1H), 7.62 (t, J=8.3 Hz,1H), 7.48 (t, J=7.9 Hz, 1H), 7.32 (t, J=7.8 Hz, 1H), 7.11 (dd, J=7.5,1.4 Hz, 1H), 7.04 (d, J=7.5 Hz, 1H) 5.55 (br, 1H), 4.55-4.14 (m, 5H),3.95 (s, 3H), 3.91 (s, 3H), 3.88-2.95 (m, 12H), 2.04-1.82 (m, 7H),1.58-1.47 (m, 4H), 1.46 (s, 2H), 1.42-1.32 (m, 2H), 1.14 (d, J=6.0 Hz,3H).

TABLE 5 The compounds in Table 5 were prepared in accordance with thesynthetic protocols set forth in Example 31 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 32(S)-4-(2-(2-((2-chloro-3′-(5- (2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl- [1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

783.4 33 4-(2-(2-((2-chloro-3′-(5-(2- hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-2′-methyl-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylicacid

769.4

Example 344,4′-(((((2-chloro-2′-methyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid)

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 5.3 mg, 0.027 mmol) was added to a mixture of methyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 27, Step 4: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andthen treated with lithium hydroxide, monohydrate (5.7 mg, 0.135 mmol).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith methanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA)to give the desired product as the TFA salt. LC-MS calculated forC₄₉H₆₀ClN₈O₆ (M+H)⁺: m/z=891.4; found 891.4.

TABLE 6 The compounds in Table 6 were prepared in accordance with thesynthetic protocols set forth in Example 34 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 354-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]heptan- 1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2- methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

877.4 36 4-(2-(2-((3′-(5-(4- carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′- methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

873.4

Example 374-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: tert-butyl2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A solution of tert-butyl1-methyl-2-((2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 27, Step 2: 254 mg, 0.511 mmol) in dichloromethane (1.0 mL) andtrifluoroacetic acid (0.5 mL) was stirred at room temperature for 30min. The reaction mixture was concentrated under reduced pressure. Amixture of the residue, tert-butyl2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 1, Step 3: 200 mg, 0.426 mmol), sodium carbonate (226 mg, 2.129mmol) and[1,1-bis(di-cyclohexylphosphino)ferrocene]dichloropalladium(II) (32.3mg, 0.043 mmol) in 1,4-dioxane (2.0 mL) and water (2.0 mL) was purgedwith nitrogen and then stirred at 110° C. for 2 h. After being cooled toroom temperature, the reaction mixture was diluted with water andextracted with dichloromethane. The combined organic layers were washedwith brine, dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₃₄H₄₀ClN₈O₄ (M+H)⁺: m/z=659.3;found 659.3.

Step 2: methyl4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 44.7 mg, 0.228 mmol) was added to a mixture of tert-butyl2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 1: 100 mg, 0.152 mmol), and sodium triacetoxyborohydride (96 mg,0.455 mmol) in dichloromethane (1.5 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wastreated with dichloromethane (1.0 mL) and trifluoroacetic acid (0.5 mL)at room temperature for 1 h. The mixture was concentrated under reducedpressure. The residue was treated with saturated aqueous NaHCO₃solution, and extracted with dichloromethane. The combined organiclayers were dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₄₀H₄₈ClN₈O₄ (M+H)⁺: m/z=739.3;found 739.3.

Step 3:4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Lithium hydroxide, monohydrate (2.8 mg, 0.068 mmol) was added to asolution of methyl4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 2: 10.0 mg, 0.014 mmol) in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith MeOH, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₃₉H₄₆ClN₈O₄ (M+H)⁺: m/z=725.3; found 725.3.

Example 384-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Tetrahydro-4H-pyran-4-one (2.7 mg, 0.027 mmol) was added to a mixture ofmethyl4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 37, Step 2: 10.0 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andtreated with lithium hydroxide, monohydrate (2.8 mg, 0.068 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₄H₅₄ClN₈O₅ (M+H)⁺: m/z=809.4; found 809.4.

TABLE 7 The compounds in Table 7 were prepared in accordance with thesynthetic protocols set forth in Example 38 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 394-(2-(2-((2′-chloro-3′-(1,5- dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine- 2-carboxamido)-2-methyl- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

739.3 40 4-(2-(2-((3′-(5-(1- carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2- methyl[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

851.4

Example 41(R)-4-(2-(2-((2′-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

(R)-2-((Tert-butyldimethylsilyl)oxy)propanal (5.1 mg, 0.027 mmol) wasadded to a mixture of methyl4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 37, Step 2: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered, and concentrated under reduced pressure.The residue was dissolved in methanol (0.10 mL), and then treated withHCl in 1,4-dioxane (4.0 M, 67.6 μL, 0.271 mmol) at 40° C. for 2 h. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and thentreated with lithium hydroxide, monohydrate (5.7 mg, 0.135 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₂H₅₂ClN₈O₅ (M+H)⁺: m/z=783.4; found 783.4.

TABLE 8 The compounds in Table 8 were prepared in accordance with thesynthetic protocols set forth in Example 41 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 42(S)-4-(2-(2-((2′-chloro-3′-(5- (2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl- [1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

783.4 43 4-(2-(2-((2′-chloro-3′-(5-(2- hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-2-methyl-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylicacid

769.4

Example 444-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Methyl 4-formylbicyclo[2.2.1]heptane-1-carboxylate (Example 1, Step 6:4.9 mg, 0.027 mmol) was added to a mixture of methyl4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 37, Step 2: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.6 mg, 0.041 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andthen treated with lithium hydroxide, monohydrate (5.7 mg, 0.135 mmol).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith methanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA)to give the desired product as the TFA salt. LC-MS calculated forC₄₈H₅₈ClN₈O₆ (M+H)⁺: m/z=877.4; found 877.4.

TABLE 9 The compounds in Table 9 were prepared in accordance with thesynthetic protocols set forth in Example 44 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 454-(2-(2-((3′-(5-(4- carboxyphenethyl)-1- methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine- 2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylicacid

873.4

Example 464-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: tert-butyl2-((3-bromo-2-cyanophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

Potassium tert-butoxide in THF (1.0 M, 0.677 mL, 0.677 mmol) was addedto a solution of 5-tert-butyl 2-methyl1-methyl-6,7-dihydro-1H-imidazo[4,5-c]pyridine-2,5(4H)-dicarboxylate(Example 1, Step 2: 100 mg, 0.339 mmol) and 2-amino-6-bromobenzonitrile(66.7 mg, 0.339 mmol) in tetrahydrofuran (3.0 mL). After being stirredat room temperature for 30 min, the reaction mixture was quenched withwater, and extracted with ethyl acetate. The combined organic layerswere washed with brine, dried over Na₂SO₄, filtered, and concentratedunder reduced pressure. The residue was purified by flash chromatographyon a silica gel column eluting with 0-50% ethyl acetate in hexanes toafford the desired product. LC-MS calculated for C₂₀H₂₃BrN₅O₃ (M+H)⁺:m/z=460.1/462.1; found 460.2/462.2.

Step 2: tert-butyl2-((2′-chloro-2-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A mixture of tert-butyl2-((2-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 1, Step 4: 1078 mg, 2.085 mmol) in trifluoroacetic acid (2.0mL) and dichloromethane (4.0 mL) was stirred at room temperature for 1h. The reaction mixture was concentrated under reduced pressure. Amixture of the above residue, tert-butyl2-((3-bromo-2-cyanophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 1: 800 mg, 1.738 mmol), sodium carbonate (921 mg, 8.69 mmol) and[1,1-bis(di-cyclohexylphosphino)ferrocene]dichloropalladium(II) (132 mg,0.174 mmol) in 1,4-dioxane (12.0 mL) and water (6.0 mL) was purged withnitrogen and then stirred at 110° C. for 3 h. After being cooled to roomtemperature, the reaction mixture was diluted with water and extractedwith dichloromethane. The combined organic layers were dried overNa₂SO₄, filtered, and concentrated under reduced pressure. The residuewas purified by flash chromatography on a silica gel column eluting with0-10% methanol in dichloromethane to afford the desired product. LC-MScalculated for C₃₄H₃₇ClN₉O₄ (M+H)⁺: m/z=670.3; found 670.4.

Step 3: methyl4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 43.9 mg, 0.224 mmol) was added to a mixture of tert-butyl2-((2′-chloro-2-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 2: 100 mg, 0.149 mmol), and sodium triacetoxyborohydride (95 mg,0.458 mmol) in dichloromethane (1.5 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wastreated with dichloromethane (1.0 mL) and trifluoroacetic acid (0.5 mL)at room temperature for 1 h. The mixture was concentrated under reducedpressure. The residue was treated with saturated aqueous NaHCO₃solution, and extracted with dichloromethane. The combined organiclayers were dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₄₀H₄₅ClN₉O₄ (M+H)⁺: m/z=750.3;found 750.3.

Step 4:4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Lithium hydroxide, monohydrate (2.8 mg, 0.067 mmol) was added to asolution of methyl4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 3: 10 mg, 0.013 mmol) in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith MeOH, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₃₉H₄₃ClN₉O₄ (M+H)⁺: m/z=736.3; found 736.3.

Example 474-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Tetrahydro-4H-pyran-4-one (2.7 mg, 0.027 mmol) was added to a mixture ofmethyl4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 46, Step 3: 10 mg, 0.013 mmol), and sodiumtriacetoxyborohydride (8.5 mg, 0.040 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andtreated with Lithium hydroxide, monohydrate (2.8 mg, 0.067 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₄H₅₁ClN₉O₅ (M+H)⁺: m/z=820.4; found 820.4.

TABLE 10 The compounds in Table 10 were prepared in accordance with thesynthetic protocols set forth in Example 47 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 484-(2-(2-((2-chloro-2′-cyano- 3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5- c]pyridine-2-carboxamido)- [1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

750.3

Example 49(R)-4-(2-(2-((2-chloro-2′-cyano-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

(R)-2-((Tert-butyldimethylsilyl)oxy)propanal (5.0 mg, 0.027 mmol) wasadded to a mixture of methyl4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 46, Step 3: 10 mg, 0.013 mmol), and sodiumtriacetoxyborohydride (8.5 mg, 0.040 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in methanol (0.10 mL), and then treated with HClin 1,4-dioxane (4.0 M, 66.6 μL, 0.267 mmol) at 40° C. for 2 h. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and thentreated with lithium hydroxide, monohydrate (5.6 mg, 0.133 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₂H₄₉ClN₉O₅ (M+H)⁺: m/z=794.4; found 794.4.

TABLE 11 The compounds in Table 11 were prepared in accordance with thesynthetic protocols set forth in Example 49 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 504-(2-(2-((2-chloro-2′-cyano- 3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro- 1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′- biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro- 5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

780.3

Example 514,4′-(((((2-chloro-2′-cyano-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid)

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 5.2 mg, 0.027 mmol) was added to a mixture of methyl4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 46, Step 3: 10 mg, 0.013 mmol), and sodiumtriacetoxyborohydride (8.5 mg, 0.040 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andthen treated with lithium hydroxide, monohydrate (5.6 mg, 0.133 mmol).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith methanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA)to give the desired product as the TFA salt. LC-MS calculated forC₄₉H₅₇ClN₉O₆ (M+H)⁺: m/z=902.4; found 902.5.

TABLE 12 The compounds in Table 12 were prepared in accordance with thesynthetic protocols set forth in Example 51 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 524-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]- heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2- cyano-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

888.4

Example 534-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: tert-butyl2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate

A mixture of tert-butyl2-((3-bromo-2-methylphenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 27, Step 1: 100 mg, 0.223 mmol) in trifluoroacetic acid (1.0mL) and dichloromethane (2.0 mL) was stirred at room temperature for 1h. The reaction mixture was concentrated under reduced pressure. Amixture of the above residue, tert-butyl1-methyl-2-((2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 27, Step 2: 133 mg, 0.267 mmol), sodium carbonate (118 mg,1.113 mmol), and[1,1-bis(di-cyclohexylphosphino)ferrocene]dichloropalladium(II) (16.9mg, 0.022 mmol) in 1,4-dioxane (1.4 mL) and water (0.7 mL) was purgedwith nitrogen and then stirred at 110° C. for 2 h. After being cooled toroom temperature, the reaction mixture was diluted with water andextracted with dichloromethane. The combined organic layers were driedover Na₂SO₄, filtered, and concentrated under reduced pressure. Theresidue was purified by flash chromatography on a silica gel columneluting with 0-10% methanol in dichloromethane to afford the desiredproduct. LC-MS calculated for C₃₅H₄₃N₈O₄ (M+H)⁺: m/z=639.3; found 639.3.

Step 2: methyl4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 46.1 mg, 0.235 mmol) was added to a mixture of tert-butyl2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Step 1: 100 mg, 0.157 mmol) and sodium triacetoxyborohydride (100 mg,0.470 mmol) in dichloromethane (1.5 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue wastreated with dichloromethane (1.0 mL) and trifluoroacetic acid (0.5 mL)at room temperature for 1 h. The mixture was concentrated under reducedpressure. The residue was treated with saturated aqueous NaHCO₃solution, and extracted with dichloromethane. The combined organiclayers were dried over Na₂SO₄, filtered, and concentrated under reducedpressure. The residue was purified by flash chromatography on a silicagel column eluting with 0-10% methanol in dichloromethane to afford thedesired product. LC-MS calculated for C₄₁H₅₁N₈O₄ (M+H)⁺: m/z=719.4;found 719.4.

Step 3:4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Lithium hydroxide, monohydrate (2.9 mg, 0.070 mmol) was added to asolution of methyl4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 2: 10 mg, 0.014 mmol) in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith MeOH, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₀H₄₉N₈O₄ (M+H)⁺: m/z=705.4; found 705.4.

Example 544,4′-(((((2,2′-dimethyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid)

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 5.5 mg, 0.028 mmol) was added to a mixture of methyl4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 53, Step 2: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.8 mg, 0.042 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), andthen treated with lithium hydroxide, monohydrate (5.8 mg, 0.139 mmol).After being stirred at 30° C. for 3 h, the reaction mixture was dilutedwith methanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA)to give the desired product as the TFA salt. LC-MS calculated forC₅₀H₆₃N₈O₆ (M+H)⁺: m/z=871.5; found 871.5.

TABLE 13 The compounds in Table 13 were prepared in accordance with thesynthetic protocols set forth in Example 54 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 554-((2-((3′-(5-(2-(4- carboxybicyclo[2.2.1]- heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

857.5 56 4-(2-(2-((2,2′-dimethyl-3′- (1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7- tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)- [1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

789.4

Example 57(R)-4-(2-(2-((3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

(R)-2-((Tert-butyldimethylsilyl)oxy)propanal (5.2 mg, 0.028 mmol) wasadded to a mixture of methyl4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 53, Step 2: 10 mg, 0.014 mmol), and sodiumtriacetoxyborohydride (8.5 mg, 0.040 mmol) in dichloromethane (0.20 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were washed with brine,dried over Na₂SO₄, filtered and concentrated under reduced pressure. Theresidue was dissolved in methanol (0.10 mL), and then treated with HClin 1,4-dioxane (4.0 M, 69.6 μL, 0.278 mmol) at 40° C. for 2 h. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and thentreated with lithium hydroxide, monohydrate (5.8 mg, 0.139 mmol). Afterbeing stirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₃H₅₅N₈O₅ (M+H)⁺: m/z=763.4; found 763.4.

TABLE 14 The compounds in Table 14 were prepared in accordance with thesynthetic protocols set forth in Example 57 using the appropriatestarting materials. Example LC-MS # Name Structure (M + H)⁺ 58(S)-4-(2-(2-((3′-(5-(2- hydroxypropyl)-1-methyl- 4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2- carboxamido)-2,2′- dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl- 1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]- heptane-1-carboxylic acid

763.4 59 4-(2-(2-((3′-(5-(2- hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H- imidazo[4,5-c]pyridine-2- carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3- yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H- imidazo[4,5-c]pyridin-5- yl)ethyl)bicyclo[2.2.1]-heptane-1-carboxylic acid

749.4

Example 604-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: methyl4-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

4-Hydroxycyclohexan-1-one (6.0 mg, 0.053 mmol) was added to a mixture ofmethyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 20 mg, 0.026 mmol), and sodium triacetoxyborohydride(16.7 mg, 0.079 mmol) in dichloromethane (0.30 mL). After being stirredat room temperature for 2 h, the reaction mixture was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were washed with brine, dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue waspurified by prep-HPLC (pH=10, acetonitrile/water+NH₄OH) to give twodesired products (cis/trans isomers).

Peak 1: retention time on analytical LC-MS (pH=10,acetonitrile/water+NH₄OH) t_(r)=1.71 min, LC-MS calculated forC₄₅H₅₅C₁₂N₈O₅ (M+H)⁺: m/z=857.4; Found: 857.4.

Peak 2: retention time on analytical LC-MS (pH=10,acetonitrile/water+NH₄OH) t_(r)=1.73 min, LC-MS calculated forC₄₅H₅₅C₁₂N₈O₅ (M+H)⁺: m/z=857.4; Found: 857.4;

Step 2:4-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Methyl4-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(5 mg, 5.83 μmol) from Step 1, peak 1 and peak 2 were respectivelytreated with lithium hydroxide, monohydrate (1.3 mg, 0.030 mmol) inTHF/MeOH/water (0.1 mL/0.1 mL/0.05 mL) at 30° C. for 2 h. The reactionswere purified by prep-HPLC (pH=2, acetonitrile/water+TFA) to give thedesired products as the TFA salt.

Compound 1 (from Step 1, peak 1): LC-MS calculated for C₄₄H₅₃C₁₂N₈SO₅(M+H)⁺: m/z=843.4; found: 843.4.

Compound 2 (from Step 1, peak 2): LC-MS calculated for C₄₄H₅₃Cl₂N₈O₅(M+H)⁺: m/z=843.4; found: 843.4.

Example 614-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Step 1: methyl4-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

4-Hydroxycyclohexan-1-one (6.2 mg, 0.054 mmol) was added to a mixture ofmethyl4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 27, Step 4: 20 mg, 0.027 mmol), and sodiumtriacetoxyborohydride (17.2 mg, 0.081 mmol) in dichloromethane (0.30mL). After being stirred at room temperature for 2 h, the reactionmixture was quenched with saturated aqueous NaHCO₃ solution, andextracted with dichloromethane. The combined organic layers were washedwith brine, dried over Na₂SO₄, filtered and concentrated under reducedpressure. The residue was purified by prep-HPLC (pH=10,acetonitrile/water+NH₄OH) to give two desired products (cis/transisomers).

Peak 1: retention time on analytical LC-MS (pH=10,acetonitrile/water+NH₄OH) t_(r)=1.62 min, LC-MS calculated forC₄₆H₅₈ClN₈O₅ (M+H)⁺: m/z=837.4; Found: 837.4.

Peak 2: retention time on analytical LC-MS (pH=10,acetonitrile/water+NH₄OH) t_(r) 5=1.64 min, LC-MS calculated forC₄₆H₅₈ClN₈O₅ (M+H)⁺: m/z=837.4; Found: 837.4.

Step 2:4-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Methyl4-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(5 mg, 5.97 μmol) from Step 1, peak 1 and peak 2 were respectivelytreated with lithium hydroxide, monohydrate (1.3 mg, 0.030 mmol) inTHF/MeOH/water (0.1 mL/0.1 mL/0.05 mL) at 30° C. for 2 h. The reactionswere purified by prep-HPLC (pH=2, acetonitrile/water+TFA) to give thedesired products as the TFA salt.

Compound 1 (from Step 1, peak 1): LC-MS calculated for C₄₅H₅₆ClN₈O₅(M+H)⁺: m/z=823.4; found: 823.4.

Compound 2 (from Step 1, peak 2): LC-MS calculated for C₄₅H₅₆ClN₈O₅(M+H)⁺: m/z=823.4; found: 823.4.

Example 624-(2-(2-((3′-(5-(2-(trans-4-carboxycyclohexyl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Methyl 4-(2-oxoethyl)cyclohexane-1-carboxylate (4.9 mg, 0.026 mmol) wasadded to a mixture of methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 10 mg, 0.013 mmol), and sodium triacetoxyborohydride(8.4 mg, 0.039 mmol) in dichloromethane (0.2 mL). After being stirred atroom temperature for 2 h, the reaction mixture was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were dried over Na₂SO₄, filtered andconcentrated under reduced pressure. The residue was dissolved inTHF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and treated with lithiumhydroxide, monohydrate (5.5 mg, 0.132 mmol). After being stirred at 30°C. for 3 h, the reaction mixture was diluted with methanol, and purifiedby prep-HPLC (pH=2, acetonitrile/water+TFA) to give the desired product(major peak) as the TFA salt. LC-MS calculated for C₄₇H₅₇Cl₂N₈O₆ (M+H)⁺:m/z=899.4; found 899.4.

Example 634-(2-(2-((3′-(5-(4-carboxybutyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid

Step 1: methyl4-(2-(2-((3′-(5-(5-(tert-butoxy)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate

Tert-butyl 5-oxopentanoate (34.0 mg, 0.197 mmol) was added to a mixtureof methyl4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 1, Step 8: 100 mg, 0.132 mmol), and sodiumtriacetoxyborohydride (84 mg, 0.395 mmol) in dichloromethane (1.2 mL).After being stirred at room temperature for 2 h, the reaction mixturewas quenched with saturated aqueous NaHCO₃ solution, and extracted withdichloromethane. The combined organic layers were dried over Na₂SO₄,filtered and concentrated under reduced pressure. The residue waspurified by flash chromatography on a silica gel column eluting with0-10% methanol in dichloromethane to afford the desired product. LC-MScalculated for C₄₈H₆₁Cl₂N₈O₆ (M+H)⁺: m/z=915.4; found 915.5.

Step 2:4-(2-(2-((3′-(5-(4-carboxybutyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylic Acid

A solution of methyl4-(2-(2-((3′-(5-(5-(tert-butoxy)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Step 1: 10 mg, 10.9 μmol) in tetrahydrofuran (0.15 mL) was treated withHCl in 1,4-dioxane (4.0 M, 27.3 μL, 0.109 mmol) at 40° C. for 1 h. Thereaction mixture was concentrated under reduced pressure. The residuewas dissolved in THF/MeOH/water (0.1 mL/0.1 mL/0.05 mL), and treatedwith lithium hydroxide, monohydrate (4.6 mg, 0.109 mmol). After beingstirred at 30° C. for 3 h, the reaction mixture was diluted withmethanol, and purified by prep-HPLC (pH=2, acetonitrile/water+TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₃H₅₁Cl₂N₈O₆ (M+H)⁺: m/z=845.3; found 845.3.

Example 644-(2-(2-((2,2′-dichloro-3′-(5-(5-(dimethylamino)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

A solution of methyl4-(2-(2-((3′-(5-(5-(tert-butoxy)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylate(Example 63, Step 1: 10 mg, 10.9 μmol) in tetrahydrofuran (0.15 mL) wastreated with HCl in 1,4-dioxane (4.0 M, 27.3 μL, 0.109 mmol) at 40° C.for 1 h. The reaction mixture was concentrated under reduced pressure.The residue was dissolved in DMF (0.15 mL), and then subsequentlytreated with N,N-diisopropylethylamine (9.5 μL, 0.055 mmol),1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium3-oxide hexafluorophosphate (8.3 mg, 0.022 mmol), and dimethylaminehydrochloride (1.4 mg, 0.016 mmol). After being stirred at roomtemperature for 2 h, lithium hydroxide, monohydrate (4.6 mg, 0.109 mmol)was added. The reaction mixture was stirred at 30° C. for 3 h, thendiluted with methanol, and purified by pH 2 preparative LC/MS(MeCN/water with TFA) to give the desired product. LC-MS calculated forC₄₅H₅₆C₁₂N₉O₅ (M+H)⁺: m/z=872.4; found 872.4.

Example 654-(2-(2-((3′-(5-(cis-4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Step 1: methyl5-(cis-4-(tert-butoxycarbonyl)-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxylateand methyl5-(trans-4-(tert-butoxycarbonyl)-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxylate

A solution of 5-tert-butyl 2-methyl1-methyl-6,7-dihydro-1H-imidazo[4,5-c]pyridine-2,5(4H)-dicarboxylate(Example 1, Step 2: 0.50 g, 1.693 mmol) in dichloromethane (5.0 mL) andtrifluoroacetic acid (5.0 mL) was stirred at room temperature for 1 h.The mixture was concentrated under reduced pressure. The residue wasdissolved in dichloromethane (10.0 mL) and sequentially treated withN,N-diisopropylethylamine (0.89 mL, 5.08 mmol), sodiumtriacetoxyborohydride (0.72 g, 3.39 mmol) and tert-butyl1-methyl-4-oxocyclohexane-1-carboxylate (1.1 g, 4.66 mmol). After beingstirred at room temperature for 2 h, the reaction was quenched withsaturated aqueous NaHCO₃ solution, and extracted with dichloromethane.The combined organic layers were dried over Na₂SO₄, filtered, andconcentrated under reduced pressure. The residue was purified by flashchromatography on a silica gel column eluting with 0-10% methanol indichloromethane to afford a mixture of cis/trans isomers, which wasseparated by a preparative chiral column (Phenomenex LUX 5 umCellulose-4) eluting with 10% EtOH in hexanes to give the desiredproducts.

Peak 1 (cis): retention time t_(r)=20.1 min, LC-MS calculated forC₂₁H₃₄N₃O₄ (M+H)⁺: m/z=392.3; Found: 392.2. ¹H NMR (500 MHz, CDCl₃) δ3.92 (s, 3H), 3.85 (s, 3H), 3.66 (s, 2H), 2.91 (t, J=5.5 Hz, 2H), 2.66(t, J=5.5 Hz, 2H), 2.62-2.52 (m, 1H), 2.28-2.20 (m, 2H), 1.86-1.77 (m,2H), 1.52-1.42 (m, 11H), 1.21-1.14 (m, 2H), 1.13 (s, 3H).

Peak 2 (trans): retention time t_(r)=24.3 min, LC-MS calculated forC₂₁H₃₄N₃O₄ (M+H)⁺: m/z=392.3; Found: 392.2. ¹H NMR (500 MHz, CDCl₃) δ3.92 (s, 3H), 3.86 (s, 3H), 3.68 (s, 2H), 2.94 (t, J=5.7 Hz, 2H), 2.67(t, J=5.7 Hz, 2H), 2.50 (tt, J=10.6, 3.5 Hz, 1H), 1.83-1.76 (m, 2H),1.75-1.69 (m, 4H), 1.64-1.52 (m, 2H), 1.45 (s, 9H), 1.18 (s, 3H).

Step 2: tert-butylcis-4-(2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)-1-methylcyclohexane-1-carboxylate

Potassium tert-butoxide in THF (1.0 M, 0.56 mL, 0.56 mmol) was added toa solution of methyl5-(cis-4-(tert-butoxycarbonyl)-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxylate(Step 1, Peak 1: 110 mg, 0.281 mmol) and 3-bromo-2-chloroaniline (58.0mg, 0.281 mmol) in tetrahydrofuran (1.5 mL). After being stirred at roomtemperature for 30 min, the reaction mixture was quenched with water,and extracted with ethyl acetate. The combined organic layers werewashed with brine, dried over Na₂SO₄, filtered, and concentrated underreduced pressure. The residue was purified by flash chromatography on asilica gel column eluting with 0-50% ethyl acetate in hexanes to affordthe desired product. LC-MS calculated for C₂₆H₃₅BrClN₄O₃ (M+H)⁺:m/z=565.2/567.2; found 565.2/567.2.

Step 3: tert-butylcis-4-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)-1-methylcyclohexane-1-carboxylate

A solution of tert-butyl2-((2-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-5-carboxylate(Example 1, Step 4: 164 mg, 0.318 mmol) in trifluoroacetic acid (0.5 mL)and dichloromethane (1.0 mL) was stirred at room temperature for 1 h.The reaction mixture was concentrated under reduced pressure. A mixtureof the above residue, tert-butylcis-4-(2-((3-bromo-2-chlorophenyl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)-1-methylcyclohexane-1-carboxylate(Step 2: 150 mg, 0.265 mmol), sodium carbonate (140 mg, 1.325 mmol) and[dichloro[1,1′-bis(diphenylphosphino)ferrocene]palladium (II)dichloromethane adduct (21.6 mg, 0.027 mmol) in 1,4-dioxane (1.6 mL) andwater (0.8 mL) was purged with nitrogen and then stirred at 110° C. for2 h. After being cooled to room temperature, the reaction mixture wasdiluted with water and extracted with dichloromethane. The combinedorganic layers were dried over Na₂SO₄, filtered, and concentrated underreduced pressure. The residue was purified by flash chromatography on asilica gel column eluting with 0-10% methanol in dichloromethane toafford the desired product. LC-MS calculated for C₄₀H₄₉C₁₂N₈O₄ (M+H)⁺:m/z=775.3; found 775.4.

Step 4:4-(2-(2-((3′-(5-(cis-4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

Methyl 4-(2-oxoethyl)bicyclo[2.2.1]heptane-1-carboxylate (Example 1,Step 7: 3.8 mg, 0.019 mmol) was added to a mixture of tert-butylcis-4-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)-1-methylcyclohexane-1-carboxylate(Step 3: 10 mg, 0.013 mmol) and sodium triacetoxyborohydride (8.2 mg,0.039 mmol) in dichloromethane (0.20 mL). After being stirred at roomtemperature for 2 h, the reaction mixture was quenched with saturatedaqueous NaHCO₃ solution, and extracted with dichloromethane. Thecombined organic layers were dried over Na₂SO₄, filtered andconcentrated under reduced pressure. The residue was dissolved inmethanol (0.10 mL), and then treated with HCl in 1,4-dioxane (4.0 M, 32μL, 0.129 mmol) at 40° C. for 1 h. The reaction mixture was concentratedunder reduced pressure. The residue was dissolved in THF/MeOH/water (0.1mL/0.1 mL/0.05 mL), and then treated with lithium hydroxide, monohydrate(5.4 mg, 0.129 mmol). After being stirred at 30° C. for 3 h, thereaction mixture was diluted with methanol, and purified by prep-HPLC(pH=2, acetonitrile/water+TFA) to give the desired product as the TFAsalt. LC-MS calculated for C₄₆H₅₅Cl₂N₈O₆ (M+H)⁺: m/z=885.4; found 885.4.

Example 664-(2-(2-((3′-(5-(trans-4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicAcid

This compound was prepared using similar procedures as described forExample 65 with methyl5-(trans-4-(tert-butoxycarbonyl)-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxylate(from Example 65, Step 1, Peak 2) replacing methyl5-(cis-4-(tert-butoxycarbonyl)-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxylatein Step 2. The reaction mixture was diluted with methanol, and thenpurified by purified by pH 2 preparative LC/MS (MeCN/water with TFA) togive the desired product as the TFA salt. LC-MS calculated forC₄₆H₅₅Cl₂N₈O₆ (M+H)⁺: m/z=885.4; found 885.4.

Example A. Homogeneous Time-Resolved Fluorescence (HTRF) PD-1/PD-L1Binding Assay

The assays were conducted in a standard black 384-well polystyrene platewith a final volume of 20 μL. Inhibitors were first serially diluted inDMSO and then added to the plate wells before the addition of otherreaction components. The final concentration of DMSO in the assay was1%. The assays were carried out at 25° C. in the PBS buffer (pH 7.4)with 0.05% Tween-20 and 0.1% BSA. Recombinant human PD-L1 protein(19-238) with a His-tag at the C-terminus was purchased fromAcroBiosystems (PD1-H5229). Recombinant human PD-1 protein (25-167) withFc tag at the C-terminus was also purchased from AcroBiosystems(PD1-H5257). PD-L1 and PD-1 proteins were diluted in the assay bufferand 10 μL was added to the plate well. Plates were centrifuged andproteins were preincubated with inhibitors for 40 minutes. Theincubation was followed by the addition of 10 μL of HTRF detectionbuffer supplemented with Europium cryptate-labeled anti-human IgG(PerkinElmer-AD0212) specific for Fc and anti-His antibody conjugated toSureLight®-Allophycocyanin (APC, PerkinElmer-AD0059H). Aftercentrifugation, the plate was incubated at 25° C. for 60 min. beforereading on a PHERAstar FS plate reader (665 nm/620 nm ratio). Finalconcentrations in the assay were—3 nM PD1, 10 nM PD-L1, 1 nM europiumanti-human IgG and 20 nM anti-His-Allophycocyanin. IC₅₀ determinationwas performed by fitting the curve of percent control activity versusthe log of the inhibitor concentration using the GraphPad Prism 5.0software.

Example B. Src Homology Region 2 Domain-Containing Phosphatase (SHP)Assay

U2OS/PD-L1 cells (DiscoveRx Corporation) were maintained in McCoy's 5Amedium with addition of 10% FBS, 0.25 μg/ml Puromycin. After removingthe culture media, the cell medium was replaced with assay medium(RPMI1640 medium with 1% FBS). The U2OS/PD-L1 cells were then added in384-well black clear bottom assay plate (CELLCOAT® Tissue CulturePlates, Greiner Bio-One) at 5000 cells per well in 20 μL assay medium.Test compounds were prepared by serial dilution in DMSO and 125 nLcompound were first transferred to the 384 REMP plate well(Thermofisher) by ECHO liquid handler (Labcyte) followed with additionof 27.5 μL assay medium. 5 μL/well compounds in the assay medium weretransferred to the cell plate with 0.05% DMSO in the final assay at 0.25M. Jurkat-PD-1-SHP cells (DiscoveRx Corporation) were cultured inRPMI1640 medium supplemented with 10% FBS, 250 μg/ml Hygromycin B, 500μg/ml G418. After the replacement of culture media with assay medium,5,000 Jurkat-PD-1-SHP cells in 20 μL were dispensed into each well. Theassay plate was incubated at 37° C., 5% CO₂ for 2 hours before 2.5 μLPathHunter reagent 1 (DiscoveRx Corporation) were added to each well.The assay plate was shaken for 1 min at 350 rpm in the dark followedwith addition of 10 μL PathHunter reagent 2 (DiscoveRx Corporation).Chemiluminescent signal was recorded with TopCount reader (Perkin Elmer)after incubation at room temperature for 1 hour. Wells with DMSO wereserved as the positive controls and wells containing no cells were usedas negative controls. IC₅₀ determination was performed by fitting thecurve of percentage of control activity versus the log of the compoundconcentration using the GraphPad Prism 6.0 software.

Example C. Nuclear Factor of Activated T-Cells (NFAT) Assay

PD-L1 aAPC/CHO-K1 cells (Promega) were maintained in F-12 medium withaddition of 10% FBS, 200 μg/ml Hygromycin B, 250 μg/ml Geneticin (G418).Jurkat-PD-1-NFAT effector cells (Promega) were cultured in RPMI 1640medium supplemented with 10% FBS, 100 μg/ml Hygromycin B, 500 μg/mlG418. The culture media of PD-L1 aAPC/CHO-K1 cells were first replacedwith assay medium (RPMI1640 medium with 1% FBS). The PD-L1 aAPC/CHO-K1cells were then added in a white 384-well white clear bottom assay plate(CELLCOAT® Tissue Culture Plates, Greiner Bio-One) at 8000 per well in10 μL assay medium. Test compounds were prepared by serial dilution inDMSO and 0.8 μL test compounds in DMSO were first transferred to the 384REMP plate well (Thermofisher) by PlateMate Plus (Thermofisher) followedwith addition of 50 μL plating medium. 5 μL compounds in the assaymedium were transferred to the cells with 0.4% DMSO in the final assayat 2 μM. After removing the culture media, 10,000 Jurkat-PD-1-NFATeffector cells in 5 μL assay medium was dispensed into each well. Theassay plate was incubated at 37° C., 5% CO₂ for 24 hours. After theassay plate was equilibrated to room temp for 15 minutes, 20 L/well ofBio-Glo™ reagent (Promega) were added. After 8 minutes incubation atroom temperature, luminescence was read at with Pherastar microplatereader (BMG Labtech). The fold of induction (FOI) was calculated basedon the ratio of luminescence normalized to the DMSO wells within eachassay plate. The maximum percentage of induction was reported based onthe ratio between the highest FOI of each compound and the maximum FOIof control compound within each assay plate. Wells with DMSO were servedas the negative controls and wells containing control compound with thehighest FOI were used as positive controls. EC50 determination wasperformed by fitting the curve of percent control activity versus thelog of the compound concentration using the GraphPad Prism 6.0 software.

Example D. PD-L1 Whole Blood Internalization Assay

To determine PD-L1 internalization in human whole blood, normal humanblood (Biological Specialty Corp, Colmar. Pa.) was incubated in thepresence or absence of a concentration range of test compounds and 1ng/ml human interferon γ (R&D Systems Inc. Minn. MN) in a 96 well “2 mlAssay Block” (Corning, Corning N.Y.) for 18-20 hours at 37° C. Blood wasthen stained with PD-L1 (MIH1, eBioscience; or BD Biosciences San Jose,Calif.), CD14 (Life Technologies, Carlsbad, Calif.) for 30 minutes inthe dark at room temperature. Whole Blood/red cells were lysed/fixed(lysis buffer BD Biosciences) for 5 minutes at 37° C. in the dark andthen centrifuged at 1600 RPM for 5 minutes. Cells were resuspended inStain Buffer (BD Bioscience, San Jose, Calif.) and transferred into 96well round bottom plates (Corning). Cells were gated on CD14+(BDBiosciences) and PD-L1 expression determined by mean fluorescenceintensity (MFI) (BD LSRFortessa™ X-20). IC₅₀ determination was performedby fitting the curve of compound percent inhibition versus the log ofthe compound concentration using the GraphPad Prism 7.0 software.

Example E. In Vivo Pharmacokinetics in Rats, Monkeys and Dogs

For in vivo pharmacokinetic experiments, test compounds are administeredto male Sprague Dawley rats, male beagle dogs, or male and femaleCynomolgus monkeys intravenously or via oral gavage. For IV dosing, testcompounds are dosed at 0.5 to 1 mg/kg using a formulation of 10%dimethylacetamide (DMAC) in acidified saline via IV bolus for rat and 5min or 10 min IV infusion for dog and monkey respectively. For oraldosing, test compounds are dosed at 1.0 to 3.0 mg/kg using 5% DMAC in0.5% methylcellulose in citrate buffer (pH 3.5). Blood samples arecollected at predose and various time points up to 24 hours postdose.All blood samples are collected using EDTA as the anticoagulant andcentrifuged to obtain plasma samples. The plasma concentrations of testcompounds are determined by LC-MS methods. The measured plasmaconcentrations are used to calculate PK parameters by standardnoncompartmental methods using Phoenix® WinNonlin software program(version 7.0, Pharsight Corporation).

In rats and monkeys, cassette dosing of test compounds are conducted toobtain preliminary PK parameters.

Example F. Results

Compounds of the present disclosure, as exemplified in Examples 1-66,were assessed in each of the HTRF PD-1/PD-L1 binding assay (Example A),SHP assay (Example B), NFAT assay (Example C), and whole bloodinternalization assay (Example D). The cutoffs for ranges of valuesobserved in each of the assays are shown. The results obtained for thetested compounds are shown in Table 15.

Cutoffs + ++ +++ HTRF binding assay  <=5 nM >5 to <=10  >10 to <=100IC₅₀ (nM) SHP Assay <=10 nM >10 to <=100 >100 to <=500 IC₅₀ (nM) NFATassay <=10 nM >10 to <=100 >100 to <=500 EC₅₀ (nM) whole blood <=10nM >10 to <=100 >100 to <=500 internalization assay IC₅₀ (nM)

TABLE 15 Whole HTRF Blood binding SHP NFAT (24 HR) Example IC₅₀ (nM)IC₅₀ (nM) EC₅₀ (nM) IC₅₀ (nM) 1 + + ++ + 2 + + ++ ++ 3 + + ++ 4 + + ++5 + + + 6 + + ++ 7 + ++ ++ 8 + + ++ +++ 9 + + ++ ++ 10 + + ++ ++ 11 ++++ ++ +++ 12 + + ++ ++ 13 + + + ++ 14 + + ++ ++ 15 + + ++ ++ 16 + + + ++17 + + ++ ++ 18 + + ++ ++ 19 + + ++ ++ 20 + + ++ ++ 21 + + ++ ++ 22 + +++ ++ 23 + + ++ +++ 24 + + ++ ++ 25 + ++ ++ +++ 26 + + ++ 27 + + ++ ++28 + ++ ++ 29 + + ++ 30 + + ++ ++ 31 + + ++ ++ 32 + ++ ++ 33 + ++ ++34 + + ++ ++ 35 + ++ +++ +++ 36 + + ++ ++ 37 + + ++ ++ 38 + + ++ ++39 + + ++ 40 + + ++ ++ 41 + + ++ ++ 42 + + ++ ++ 43 + + ++ ++ 44 + + +++++ 45 ++ + ++ +++ 46 + + ++ 47 + ++ 48 + + ++ 49 + ++ 50 + ++ 51 + + ++++ 52 + ++ +++ 53 + + ++ 54 + + ++ +++ 55 + + ++ 56 + + ++ +++ 57 + + ++++ 58 + + ++ +++ 59 + + +++ 60 (compound 1) + + + ++ 60 (compound2) + + + ++ 61 (compound 1) + + ++ ++ 61 (compound 2) + + ++ ++ 62 + +++ ++ 63 + ++ ++ 64 + + ++ 65 + + ++ ++ 66 + + + ++

Various modifications of the invention, in addition to those describedherein, will be apparent to those skilled in the art from the foregoingdescription. Such modifications are also intended to fall within thescope of the appended claims. Each reference, including withoutlimitation all patent, patent applications, and publications, cited inthe present application is incorporated herein by reference in itsentirety.

What is claimed is:
 1. A compound of Formula I:

or a pharmaceutically acceptable salt or a stereoisomer thereof,wherein: R¹ is methyl, CN, F, Cl, or Br; R² is methyl, CN, F, Cl, or Br;and R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-,C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, 4- to 6-membered heterocycloalkyl or4- to 6-membered heterocycloalkyl-C₁₋₂ alkyl-, wherein the 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- each has one or two heteroatoms as ring members selected from O,N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- of R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, CH₃, F,Cl, Br, CN, ethyl, and propyl.
 2. A compound of Formula I:

or a pharmaceutically acceptable salt or a stereoisomer thereof,wherein: R¹ is methyl, CN, F, Cl, or Br; R² is methyl, CN, F, Cl, or Br;and R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-,C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, 4- to 6-membered heterocycloalkyl or4- to 6-membered heterocycloalkyl-C₁₋₂ alkyl-, wherein the 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- each has one or two heteroatoms as ring members selected from O,N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, 4- to6-membered heterocycloalkyl and 4- to 6-membered heterocycloalkyl-C₁₋₂alkyl- of R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, and OH.
 3. The compoundof claim 1, or a pharmaceutically acceptable salt or a stereoisomerthereof, wherein R¹ is methyl, F, Cl, or Br.
 4. The compound of claim 1,or a pharmaceutically acceptable salt or a stereoisomer thereof, whereinR¹ is methyl.
 5. The compound of claim 1, or a pharmaceuticallyacceptable salt or a stereoisomer thereof, wherein R¹ is F, Cl, or Br.6. The compound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R¹ is Cl.
 7. The compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, wherein R²is methyl.
 8. The compound of claim 1, or a pharmaceutically acceptablesalt or a stereoisomer thereof, wherein R² is CN.
 9. The compound ofclaim 1, or a pharmaceutically acceptable salt or a stereoisomerthereof, wherein R² is F, Cl, or Br.
 10. The compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, wherein R²is Cl.
 11. The compound of claim 1, or a pharmaceutically acceptablesalt or a stereoisomer thereof, wherein R¹ is Cl and R² is Cl.
 12. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R¹ is Cl and R² is methyl.
 13. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R¹ is methyl and R² is Cl.
 14. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R¹ is Cl and R² is CN.
 15. The compound ofclaim 1, or a pharmaceutically acceptable salt or a stereoisomerthereof, wherein R¹ is methyl and R² is methyl.
 16. The compound ofclaim 1, or a pharmaceutically acceptable salt or a stereoisomerthereof, wherein R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl, wherein the5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, and CH₃.
 17. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl, wherein the5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, and OH.
 18. The compound of claim 1,or a pharmaceutically acceptable salt or a stereoisomer thereof, whereinR³ is H.
 19. The compound of claim 1, or a pharmaceutically acceptablesalt or a stereoisomer thereof, wherein R³ is C₁₋₄ alkyl, optionallysubstituted with 1 or 2 substituents independently selected from COOH,OH, and CON(CH₃)₂.
 20. The compound of claim 1, or a pharmaceuticallyacceptable salt or a stereoisomer thereof, wherein R³ is C₁₋₄ alkyl,optionally substituted with 1 or 2 substituents independently selectedfrom COOH and OH.
 21. The compound of claim 1, or a pharmaceuticallyacceptable salt or a stereoisomer thereof, wherein R³ is methyl, ethyl,isopropyl, 1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl,2-hydroxypropyl, 2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl,3-carboxypropyl, 2-carboxy-2-methylpropyl, or 4-carboxybutyl.
 22. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl or2-carboxy-2-methylpropyl.
 23. The compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, wherein R³is C₃₋₈ cycloalkyl, optionally substituted with 1 or 2 substituentsindependently selected from COOH, OH, and CH₃.
 24. The compound of claim1, or a pharmaceutically acceptable salt or a stereoisomer thereof,wherein R³ is C₃₋₈ cycloalkyl, optionally substituted with 1 or 2substituents independently selected from COOH and OH.
 25. The compoundof claim 1, or a pharmaceutically acceptable salt or a stereoisomerthereof, wherein R³ is C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, optionallysubstituted with 1 or 2 substituents independently selected from COOHand OH.
 26. The compound of claim 1, or a pharmaceutically acceptablesalt or a stereoisomer thereof, wherein R³ is C₆₋₁₀ aryl-C₁₋₂ alkyl,optionally substituted with 1 or 2 substituents independently selectedfrom COOH and OH.
 27. The compound of claim 1, or a pharmaceuticallyacceptable salt or a stereoisomer thereof, wherein R³ is cyclobutyl,4-hydroxycyclohexyl, (1-carboxycyclopropyl)methyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(4-carboxycyclohexyl)ethyl, or 4-carboxy-4-methylcyclohexyl.
 28. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, or 4-carboxyphenethyl. 29.The compound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is 5- to 6-membered heteroaryl-C₁₋₂alkyl, optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, and COOH.
 30. The compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, wherein R³is 4- to 6-membered heterocycloalkyl, optionally substituted with 1 or 2substituents independently selected from CONH₂, SO₂NH₂, and COOH. 31.The compound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is (1H-pyrazol-3-yl)methyl,tetrahydro-2H-pyran-4-yl, 1-carbamoylpiperidin-4-yl,1-sulfamoylpiperidin-4-yl, or (3-carboxy-1H-pyrazol-5-yl)methyl.
 32. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is H, methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl,(3-carboxy-1H-pyrazol-5-yl)methyl, 4-carboxybutyl,(4-carboxycyclohexyl)ethyl, or 4-carboxy-4-methylcyclohexyl.
 33. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein R³ is H, methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl, or(3-carboxy-1H-pyrazol-5-yl)methyl.
 34. The compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, wherein: R¹is methyl, CN, F, Cl, or Br; R² is methyl, CN, F, Cl, or Br; and R³ isH, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, OH,CON(CH₃)₂, and CH₃.
 35. The compound of claim 1, or a pharmaceuticallyacceptable salt or a stereoisomer thereof, wherein: R¹ is methyl, CN, F,Cl, or Br; R² is methyl, CN, F, Cl, or Br; and R³ is H, C₁₋₄ alkyl, C₃₋₈cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, or 4- to 6-membered heterocycloalkyl,wherein the 5- to 6-membered heteroaryl-C₁₋₂ alkyl and 4- to 6-memberedheterocycloalkyl each has one or two heteroatoms as ring membersselected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈ cycloalkyl,C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-memberedheteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkyl of R³ areeach optionally substituted with 1 or 2 substituents independentlyselected from CONH₂, SO₂NH₂, COOH, and OH.
 36. The compound of claim 1,or a pharmaceutically acceptable salt or a stereoisomer thereof,wherein: R¹ is methyl or Cl; R² is methyl, CN, or Cl; and R³ is H, C₁₋₄alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, or 4- to 6-memberedheterocycloalkyl, wherein the 5- to 6-membered heteroaryl-C₁₋₂ alkyl and4- to 6-membered heterocycloalkyl each has one or two heteroatoms asring members selected from O, N and S, and wherein the C₁₋₄ alkyl, C₃₋₈cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to6-membered heteroaryl-C₁₋₂ alkyl, and 4- to 6-membered heterocycloalkylof R³ are each optionally substituted with 1 or 2 substituentsindependently selected from CONH₂, SO₂NH₂, COOH, OH, CON(CH₃)₂, and CH₃.37. The compound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein: R¹ is methyl or Cl; R² is methyl, CN, orCl; and R³ is H, C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂alkyl-, C₆₋₁₀ aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl,or 4- to 6-membered heterocycloalkyl, wherein the 5- to 6-memberedheteroaryl-C₁₋₂ alkyl and 4- to 6-membered heterocycloalkyl each has oneor two heteroatoms as ring members selected from O, N and S, and whereinthe C₁₋₄ alkyl, C₃₋₈ cycloalkyl, C₃₋₈ cycloalkyl-C₁₋₂ alkyl-, C₆₋₁₀aryl-C₁₋₂ alkyl, 5- to 6-membered heteroaryl-C₁₋₂ alkyl, and 4- to6-membered heterocycloalkyl of R³ are each optionally substituted with 1or 2 substituents independently selected from CONH₂, SO₂NH₂, COOH, andOH.
 38. The compound of claim 1, or a pharmaceutically acceptable saltor a stereoisomer thereof, wherein: R¹ is methyl or Cl; R² is methyl,CN, or Cl; and R³ is H, methyl, ethyl, isopropyl,1,3-dihydroxypropan-2-yl, 2,3-dihydroxypropyl, 2-hydroxypropyl,2-hydroxyethyl, 3-hydroxypropyl, carboxymethyl, 3-carboxypropyl,2-carboxy-2-methylpropyl, cyclobutyl, 4-hydroxycyclohexyl,(1-carboxycyclopropyl)methyl, (4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl,(3-carboxy-1H-pyrazol-5-yl)methyl, 4-carboxybutyl,(4-carboxycyclohexyl)ethyl, or 4-carboxy-4-methylcyclohexyl.
 39. Thecompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof, wherein: R¹ is methyl or Cl; R² is methyl, CN, orCl; and R³ is H, methyl, ethyl, isopropyl, 1,3-dihydroxypropan-2-yl,2,3-dihydroxypropyl, 2-hydroxypropyl, 2-hydroxyethyl, 3-hydroxypropyl,carboxymethyl, 3-carboxypropyl, 2-carboxy-2-methylpropyl, cyclobutyl,4-hydroxycyclohexyl, (1-carboxycyclopropyl)methyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl,(4-carboxybicyclo[2.2.1]heptan-1-yl)methyl,(4-carboxybicyclo[2.2.2]octan-1-yl)methyl,(3-carboxybicyclo[1.1.1]pentan-1-yl)methyl, 4-carboxyphenethyl,(1H-pyrazol-3-yl)methyl, tetrahydro-2H-pyran-4-yl,1-carbamoylpiperidin-4-yl, 1-sulfamoylpiperidin-4-yl, or(3-carboxy-1H-pyrazol-5-yl)methyl.
 40. The compound of claim 1, whereinthe compound is selected from:4-(2-(2-((2,2′-dichloro-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-ethyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-isopropyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-cyclobutyl-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(1-methyl-5-(1-sulfamoylpiperidin-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-((1H-pyrazol-3-yl)methyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-(1,3-dihydroxypropan-2-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((2,2′-dichloro-3′-(5-(2,3-dihydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(S)-4-(2-(2-((2,2′-dichloro-3′-(5-(2,3-dihydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(S)-4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid; 4-(2-(2-((2,2′-dichloro-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-(3-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4,4′-(((((2,2′-dichloro-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid);4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(carboxymethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(3-carboxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(2-carboxy-2-methylpropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-((1-carboxycyclopropyl)methyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.2]octane-1-carboxylicacid;3-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[1.1.1]pentane-1-carboxylicacid;4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;5-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)-1H-pyrazole-3-carboxylicacid;4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-2′-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((2-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(S)-4-(2-(2-((2-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4,4′-(((((2-chloro-2′-methyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid);4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2′-chloro-2-methyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2′-chloro-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(1-carbamoylpiperidin-4-yl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((2′-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(S)-4-(2-(2-((2′-chloro-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2′-chloro-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2-chloro-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(4-carboxyphenethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-2′-cyano-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-2′-cyano-3′-(1,5-dimethyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((2-chloro-2′-cyano-3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2-chloro-2′-cyano-3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-TH-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4,4′-(((((2-chloro-2′-cyano-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid);4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-chloro-2-cyano-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4,4′-(((((2,2′-dimethyl-[1,1′-biphenyl]-3,3′-diyl)bis(azanediyl))bis(carbonyl))bis(1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridine-2,5-diyl))bis(ethane-2,1-diyl))bis(bicyclo[2.2.1]heptane-1-carboxylicacid);4-((2-((3′-(5-(2-(4-carboxybicyclo[2.2.1]heptan-1-yl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)methyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dimethyl-3′-(1-methyl-5-(tetrahydro-2H-pyran-4-yl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(R)-4-(2-(2-((3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;(S)-4-(2-(2-((3′-(5-(2-hydroxypropyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(2-hydroxyethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dimethyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid; and4-(2-(2-((2-chloro-3′-(5-(4-hydroxycyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2′-methyl-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid; or a pharmaceutically acceptable salt or a stereoisomer thereof.41. The compound of claim 1, wherein the compound is selected from:4-(2-(2-((3′-(5-(2-(trans-4-carboxycyclohexyl)ethyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(4-carboxybutyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((2,2′-dichloro-3′-(5-(5-(dimethylamino)-5-oxopentyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid;4-(2-(2-((3′-(5-(cis-4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid; and4-(2-(2-((3′-(5-(trans-4-carboxy-4-methylcyclohexyl)-1-methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-2-carboxamido)-2,2′-dichloro-[1,1′-biphenyl]-3-yl)carbamoyl)-1-methyl-1,4,6,7-tetrahydro-5H-imidazo[4,5-c]pyridin-5-yl)ethyl)bicyclo[2.2.1]heptane-1-carboxylicacid; or a pharmaceutically acceptable salt or a stereoisomer thereof.42. A pharmaceutical composition comprising a compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof, and apharmaceutically acceptable excipient or carrier.
 43. A method ofinhibiting PD-1/PD-L1 interaction, said method comprising administeringto a patient a compound of claim 1, or a pharmaceutically acceptablesalt or a stereoisomer thereof.
 44. A method of treating a disease ordisorder associated with inhibition of PD-1/PD-L1 interaction, saidmethod comprising administering to a patient in need thereof atherapeutically effective amount of a compound of claim 1, or apharmaceutically acceptable salt or a stereoisomer thereof.
 45. Themethod of claim 44, wherein the disease or disorder is an infectiondisease, inflammation, autoimmune disease, cancer, or neurodegenerativedisorder
 46. A method of enhancing, stimulating and/or increasing theimmune response in a patient, said method comprising administering tothe patient in need thereof a therapeutically effective amount of acompound of claim 1, or a pharmaceutically acceptable salt or astereoisomer thereof.